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Michael A. Frohman, MD PhD – Professor

Regulation of exocytosis, cell shape, and mitochondrial fusion by lipid signaling pathways

Michael A. Frohman, MD PhD

Professor, Pharmacological Sciences
Center for Molecular Medicine, room 438
M.D., Ph.D., University of Pennsylvania
Postdoctoral, University of California, San Francisco
michael@pharm.stonybrook.edu
2-1476
Selected Publications
Old Lab Page

New Lab Page

Our laboratory examines lipid signals that alter cell morphology, regulate mitochondrial fusion, and trigger subcellular trafficking of membrane vesicles during regulated exocytosis and endocytosis. Disease-related topics include neurodegenerative disease (Charcot-Marie Tooth syndrome), diabetes, cancer, and impaired phagocytic immune responses to pathogens.

The specific topic constitutes study of signaling pathways mediated by members of the superfamiles of enzymes known as Phospholipase D (PLD) and PI4P Kinase. Classic PLD is activated by a wide variety of agonists that signal through G-protein coupled or tyrosine kinase receptors. PLD has varied cellular roles including facilitating membrane vesicle trafficking and fusion of the vesicles into the plasma membrane during regulated exocytosis, and reorganizing the actin cytoskeleton. We are currently investigating roles for PLD and PI4P lipid kinase in actin cytoskeleton reorganization, myoblast differentiation and fusion, Glut-4 glucose transporter translocation, phagocytosis, and regulated exocytosis (insulin and histamine release). In addition, we are exploring a novel member of the PLD superfamily that localizes to mitochondria and regulates fusion, and may play a role in diabetes or cause neurodegenerative disease when dysfunctional.

Selected Publications


Cai D, Netzer WJ, Zhong M, Lin Y, Du G, Frohman M, Foster DA, Sisodia SS, Xu H, Gorelick FS, Greengard P (2006). Presenilin-1 uses phospholipase D1 as a negative regulator of beta-amyloid formation. Proc Natl Acad Sci U S A. 103 1941-6.

Corrotte M, Chasserot-Golaz S, Huang P, Du G, Ktistakis NT, Frohman MA, Vitale N, Bader MF, Grant NJ (2006). Dynamics and function of phospholipase D and phosphatidic acid during phagocytosis. Traffic 7 365-77.

Choi SY, Gonzalvez F, Jenkins GM, Slomianny C, Chretien D, Arnoult D, Petit PX, Frohman MA (2006). Cardiolipin deficiency releases cytochrome c from the inner mitochondrial membrane and accelerates stimuli-elicited apoptosis. Cell Death Differ. .

Suzuki T, Kanai Y, Hara T, Sasaki J, Sasaki T, Kohara M, Maehama T, Taya C, Shitara H, Yonekawa H, Frohman MA, Yokozeki T, Kanaho Y (2006). Crucial role of the small GTPase ARF6 in hepatic cord formation during liver development. Mol Cell Biol. 26 6149-56.

Huang P, Jiang Z, Teng S, Wong YC, Frohman MA, Chung SK, Chung SS (2006). Synergism between phospholipase D2 and sorbitol accumulation in diabetic cataract formation through modulation of Na,K-ATPase activity and osmotic stress. Exp Eye Res .

Andersson L, Bostr�m P, Ericson J, Rutberg M, Magnusson B, Marchesan D, Ruiz M, Asp L, Huang P, Frohman MA, Bor�n J, Olofsson SO (2006). PLD1 and ERK2 regulate cytosolic lipid droplet formation. J Cell Sci. 119 2246-57.

Jenkins GM, Frohman MA (2005). Phospholipase D: a lipid centric review. Cell Mol Life Sci. 62 2305-16.

Bader, M.-F. and Frohman, M.A. (2005). Phospholipase D : Membrane traffic and Exocytosis In pres .

Singh AT, Frohman MA, Stern PH (2005). Parathyroid hormone stimulates phosphatidylethanolamine hydrolysis by phospholipase D in osteoblastic cells. Lipids(2) 40 1135-40.

Bostr�m P, Rutberg M, Ericsson J, Holmdahl P, Andersson L, Frohman MA, Bor�n J, Olofsson SO (2005). Cytosolic lipid droplets increase in size by microtubule-dependent complex formation. Lipids 25 1945-51.

Xiao N, Du G, Frohman MA (2005). Peroxiredoxin II functions as a signal terminator for H2O2-activated phospholipase D1. FEBS J. 272 3929-37.

LaLonde MM, Janssens H, Rosenbaum E, Choi SY, Gergen JP, Colley NJ, Stark WS, Frohman MA (2005). Regulation of phototransduction responsiveness and retinal degeneration by a phospholipase D-generated signaling lipid. J Cell Biol. 169 471-9.

Huang P, Altshuller YM, Hou JC, Pessin JE, Frohman MA (2005). Insulin-stimulated plasma membrane fusion of Glut4 glucose transporter-containing vesicles is regulated by phospholipase D1. Mol. Biol. Cell 16 2614-23.

Sasaki J, Sasaki T, Yamazaki M, Matsuoka K, Taya C, Shitara H, Takasuga S, Nishio M, Mizuno K, Wada T, Miyazaki H, Watanabe H, Iizuka R, Kubo S, Murata S, Chiba T, Maehama T, Hamada K, Kishimoto H, Frohman MA, Tanaka K, Penninger JM, Yonekawa H, Suzuki A, (2005). Regulation of anaphylactic responses by phosphatidylinositol phosphate kinase type I {alpha}. J Exp Med. 201 859-70.

Zhang Y, Kanaho Y, Frohman MA, Tsirka SE (2005). Phospholipase D1-promoted release of tissue plasminogen activator facilitates neurite outgrowth. J Neurosci. 25 1797-805.

Watanabe H, Yokozeki T, Yamazaki M, Miyazaki H, Sasaki T, Maehama T, Itoh K, Frohman MA, Kanaho Y (2004). Essential role for phospholipase D2 activation downstream of ERK MAP kinase in nerve growth factor-stimulated neurite outgrowth from PC12 cells. J Biol Chem. 279 37870-7.

Hughes WE, Elgundi Z, Huang P, Frohman MA, Biden TJ (2004). Phospholipase D1 regulates secretagogue-stimulated insulin release in pancreatic beta-cells. J Biol Chem. 279 27534-41.

Watanabe H, Yamazaki M, Miyazaki H, Arikawa C, Itoh K, Sasaki T, Maehama T, Frohman MA, Kanaho Y (2004). Phospholipase D2 functions as a downstream signaling molecule of MAP kinase pathway in L1-stimulated neurite outgrowth of cerebellar granule neurons. J Neurochem. 89 142-51.

Zhang Y, Huang P, Du G, Kanaho Y, Frohman MA, Tsirka SE (2004). Increased expression of two phospholipase D isoforms during experimentally induced hippocampal mossy fiber outgrowth. GLIA 46 74-83.

Du G, Huang P, Liang BT, Frohman MA (2004). Phospholipase D2 localizes to the plasma membrane and regulates angiotensin II receptor endocytosis. Mol. Biol. Cell 15 1024-30.

Zheng XL, Gui Y, Du G, Frohman MA, Peng DQ (2004). Calphostin-C induction of vascular smooth muscle cell apoptosis proceeds through phospholipase D and microtubule inhibition. J Biol Chem. 279 7112-8.

LaLonde, M. and Frohman, M.A. (2004). Phospholipase D. 3 306-313.

Du G, Altshuller YM, Vitale N, Huang P, Chasserot-Golaz S, Morris AJ, Bader MF, Frohman MA (2003). Regulation of phospholipase D1 subcellular cycling through coordination of multiple membrane association motifs. J Cell Biol. 162 305-15.

Huang P, Frohman MA (2003). The role of phospholipase D in Glut-4 translocation. Diabetes Metab Res Rev. BMC Neurosci. 19 456-63.

Frohman, M.A. (2003). Rapid Amplification of cDNA Ends. In press.

Fang Y, Park IH, Wu AL, Du G, Huang P, Frohman MA, Walker SJ, Brown HA, Chen J (2003). PLD1 regulates mTOR signaling and mediates Cdc42 activation of S6K1. Current Biology 13 2037-44.

Ballou LM, Jiang YP, Du G, Frohman MA, Lin RZ (2003). Ca(2+)- and phospholipase D-dependent and -independent pathways activate mTOR signaling. Federation of European Biochemical Societies 550 51-6.

Du G, Morris AJ, Sciorra VA, Frohman MA (2002). G-protein-coupled receptor regulation of phospholipase D. Methods Enzymol. 345 265-74.

Yamazaki M, Miyazaki H, Watanabe H, Sasaki T, Maehama T, Frohman MA, Kanaho Y (2002). Phosphatidylinositol 4-phosphate 5-kinase is essential for ROCK-mediated neurite remodeling. J Biol Chem. 277 17226-30.

Choi WS, Kim YM, Combs C, Frohman MA, Beaven MA (2002). Phospholipases D1 and D2 regulate different phases of exocytosis in mast cells. J Immunol. 168 5682-9.

Vitale N, Chasserot-Golaz S, Bailly Y, Morinaga N, Frohman MA, Bader MF (2002). Calcium-regulated exocytosis of dense-core vesicles requires the activation of ADP-ribosylation factor (ARF)6 by ARF nucleotide binding site opener at the plasma membrane. J Cell Biol. 159 79-89.

Du., G., Frohman, M.A. and Morris, A.J. (2001). Phospholipase D: Isoforms and Function. 41 In press.

Vitale N, Caumont AS, Chasserot-Golaz S, Du G, Wu S, Sciorra VA, Morris AJ, Frohman MA, Bader MF (2001). Phospholipase D1: a key factor for the exocytotic machinery in neuroendocrine cells. EMBO J. 20 2424-34.

Freyberg Z, Sweeney D, Siddhanta A, Bourgoin S, Frohman M, Shields D (2001). Intracellular localization of phospholipase D1 in mammalian cells. Mol. Biol. Cell 12 943-55.

Frohman, M.A. and Engebrecht, J.E. (2001). Phospholipase D in cell signaling. Chapter 15.

Zhao D, Frohman MA, Blusztajn JK (2001). Generation of choline for acetylcholine synthesis by phospholipase D isoforms. 2 16.

Humeau Y, Vitale N, Chasserot-Golaz S, Dupont JL, Du G, Frohman MA, Bader MF, Poulain B (2001). A role for phospholipase D1 in neurotransmitter release. Proc Natl Acad Sci U S A. 98 15300-5.

Denmat-Ouisse LA, Phebidias C, Honkavaara P, Robin P, Geny B, Min do S, Bourgoin S, Frohman MA, Raymond MN (2001). Regulation of constitutive protein transit by phospholipase D in HT29-cl19A cells. J Biol Chem. 276 48840-6.

Sciorra, V.A., Frohman, M.A., and Morris, A.J. (2000). Regulation of Phospholipase D signaling by phosphoinositides. 269-297.

Wu YP, Siao CJ, Lu W, Sung TC, Frohman MA, Milev P, Bugge TH, Degen JL, Levine JM, Margolis RU, Tsirka SE (2000). The tissue plasminogen activator (tPA)/plasmin extracellular proteolytic system regulates seizure-induced hippocampal mossy fiber outgrowth through a proteoglycan substrate. J Cell Biol. 148 1295-304.

Slaaby R, Du G, Altshuller YM, Frohman MA, Seedorf K (2000). Insulin-induced phospholipase D1 and phospholipase D2 activity in human embryonic kidney-293 cells mediated by the phospholipase C gamma and protein kinase C alpha signalling cascade. Biochem J. 351 Pt 613-9.

Lee C, Kim SR, Chung JK, Frohman MA, Kilimann MW, Rhee SG (2000). Inhibition of phospholipase D by amphiphysins. J Biol Chem. 275 18751-8.

Frohman, M.A. and Tsirka, S.E. (2000). Polymerase Chain reaction: specialized applications. Nature Encylopedia of Life Sciences (Robertson, S., Editor). Macmillan, London. In press.

Zhang Y, Redina O, Altshuller YM, Yamazaki M, Ramos J, Chneiweiss H, Kanaho Y, Frohman MA (2000). Regulation of expression of phospholipase D1 and D2 by PEA-15, a novel protein that interacts with them. J Biol Chem. 275 35224-32.

Du G, Altshuller YM, Kim Y, Han JM, Ryu SH, Morris AJ, Frohman MA (2000). Dual requirement for rho and protein kinase C in direct activation of phospholipase D1 through G protein-coupled receptor signaling. Mol. Biol. Cell 11 4359-68.

Park JB, Kim JH, Kim Y, Ha SH, Yoo JS, Du G, Frohman MA, Suh PG, Ryu SH (2000). Cardiac phospholipase D2 localizes to sarcolemmal membranes and is inhibited by alpha-actinin in an ADP-ribosylation factor-reversible manner. J Biol Chem. 275 21295-301.

Frohman MA, Kanaho Y, Zhang Y, Morris AJ (2000). Regulation of phospholipase D1 activity by Rho GTPases. Methods Enzymol. 325 177-89.

Frohman MA, Morris AJ (1999). Phospholipase D structure and regulation. Chem Phys Lipids. 98 127-40.

Frohman MA, Sung TC, Morris AJ (1999). Mammalian phospholipase D structure and regulation. Biochim Biophys Acta. 1439 175-86.

Sung TC, Altshuller YM, Morris AJ, Frohman MA (1999). Molecular analysis of mammalian phospholipase D2. J Biol Chem. 274 494-502.

Sung TC, Zhang Y, Morris AJ, Frohman MA (1999). Structural analysis of human phospholipase D1. J Biol Chem. 274 3659-66.

Zhang, Y. and Frohman, M.A. (1999). Rapid Amplification of cDNA Ends (RACE) to obtain full length cDNAs. 81-106.

Rizzo MA, Shome K, Vasudevan C, Stolz DB, Sung TC, Frohman MA, Watkins SC, Romero G (1999). Phospholipase D and its product, phosphatidic acid, mediate agonist-dependent raf-1 translocation to the plasma membrane and the activation of the mitogen-activated protein kinase pathway. J Biol Chem. 274 1131-9.

Yamazaki M, Zhang Y, Watanabe H, Yokozeki T, Ohno S, Kaibuchi K, Shibata H, Mukai H, Ono Y, Frohman MA, Kanaho Y (1999). Interaction of the small G protein RhoA with the C terminus of human phospholipase D1. J Biol Chem. 274 6035-8.

Sciorra VA, Rudge SA, Prestwich GD, Frohman MA, Engebrecht J, Morris AJ (1999). Identification of a phosphoinositide binding motif that mediates activation of mammalian and yeast phospholipase D isoenzymes. EMBO J. 18 5911-21.

Zhang Y, Altshuller YM, Hammond SM, Hayes F, Morris AJ, Frohman MA (1999). Loss of receptor regulation by a phospholipase D1 mutant unresponsive to protein kinase C. EMBO J. 18 6339-48.

Honda A, Nogami M, Yokozeki T, Yamazaki M, Nakamura H, Watanabe H, Kawamoto K, Nakayama K, Morris AJ, Frohman MA, Kanaho Y (1999). Phosphatidylinositol 4-phosphate 5-kinase alpha is a downstream effector of the small G protein ARF6 in membrane ruffle formation. Cell (Cambridge) 99 521-32.

Frohman, M.A. (1998). Molecular Biology of Phospholipase D 65-70.

Nakashima S, Ohguchi K, Frohman MA, Nozawa Y (1998). Increased mRNA expression of phospholipase D (PLD) isozymes during granulocytic differentiation of HL60 cells. Biochim Biophys Acta. 1389 173-7.

Redina OE, Frohman MA (1998). Genomic analysis of murine phospholipase D1 and comparison to phospholipase D2 reveals an unusual difference in gene size. Gene 222 53-60.

Redina OE, Frohman MA (1998). Organization and alternative splicing of the murine phospholipase D2 gene. Biochem J. 331 ( P 845-51.

Slaaby R, Jensen T, Hansen HS, Frohman MA, Seedorf K (1998). PLD2 complexes with the EGF receptor and undergoes tyrosine phosphorylation at a single site upon agonist stimulation. J Biol Chem. 273 33722-7.

Zhang Y, Frohman MA (1997). Using rapid amplification of cDNA ends (RACE) to obtain full-length cDNAs. 69 61-87.

Hammond SM, Jenco JM, Nakashima S, Cadwallader K, Gu Q, Cook S, Nozawa Y, Prestwich GD, Frohman MA, Morris AJ (1997). Characterization of two alternately spliced forms of phospholipase D1. Activation of the purified enzymes by phosphatidylinositol 4,5-bisphosphate, ADP-ribosylation factor, and Rho family monomeric GTP-binding proteins and protein kinase C-alpha. J Biol Chem. 272 3860-8.

Zhang, Y. and Frohman, M.A. (1997). Cloning cDNA ends using RACE. 13 81-105.

Colley WC, Altshuller YM, Sue-Ling CK, Copeland NG, Gilbert DJ, Jenkins NA, Branch KD, Tsirka SE, Bollag RJ, Bollag WB, Frohman MA (1997). Cloning and expression analysis of murine phospholipase D1. Biochem J. 326 ( P 745-53.

Morris AJ, Frohman MA, Engebrecht J (1997). Measurement of phospholipase D activity. Anal Biochem. 252 1-9.

Liang JO, Sung TC, Morris AJ, Frohman MA, Kornfeld S (1997). Different domains of mammalian ADP-ribosylation factor 1 mediate interaction with selected target proteins. J Biol Chem. 272 33001-8.

Sung, T.-C., Roper, K., Zhang, Y., Rudge, S., Temel, R., Hammond, S.M., Morris, A.J., Moss, B., Engebrecht, J., and Frohman, M.A. (1997). ) Mutagenesis of Phospholipase D defines a superfamily including a trans-Golgi viral protein required for poxvirus pathogenicity. 16 4519-4530.

Morris AJ, Hammond SM, Colley C, Sung TC, Jenco JM, Sciorra VA, Rudge SA, Frohman MA (1997). Regulation and functions of phospholipase D. 25 1151-7.

Colley WC, Sung TC, Roll R, Jenco J, Hammond SM, Altshuller Y, Bar-Sagi D, Morris AJ, Frohman MA (1997). Phospholipase D2, a distinct phospholipase D isoform with novel regulatory properties that provokes cytoskeletal reorganization. Current Biology 7 191-201.

Luo JQ, Liu X, Hammond SM, Colley WC, Feig LA, Frohman MA, Morris AJ, Foster DA (1997). RalA interacts directly with the Arf-responsive, PIP2-dependent phospholipase D1. Biochem Biophys Res Commun. 235 854-9.

Chen YG, Siddhanta A, Austin CD, Hammond SM, Sung TC, Frohman MA, Morris AJ, Shields D (1997). Phospholipase D stimulates release of nascent secretory vesicles from the trans-Golgi network. J Cell Biol. 138 495-504.

Altshuller Y, Copeland NG, Gilbert DJ, Jenkins NA, Frohman MA (1996). Gcm1, a mammalian homolog of Drosophila glial cells missing. Federation of European Biochemical Societies 393 201-4.

Morris AJ, Engebrecht J, Frohman MA (1996). Structure and regulation of phospholipase D. 17 182-5.

Frohman MA, Morris AJ (1996). Rho is only ARF the story. Phospholipid signalling. Current Biology 6 945-7.

Frohman, M. A. and Morris, A. J. (1996). Molecular studies on phospholipase D genes: New twists on an old story. In Lipases and transduction 87 250-258.

Chong JA, Tapia-Ram�rez J, Kim S, Toledo-Aral JJ, Zheng Y, Boutros MC, Altshuller YM, Frohman MA, Kraner SD, Mandel G (1995). REST: a mammalian silencer protein that restricts sodium channel gene expression to neurons. Cell (Cambridge) 80 949-57.

Hammond SM, Altshuller YM, Sung TC, Rudge SA, Rose K, Engebrecht J, Morris AJ, Frohman MA (1995). Human ADP-ribosylation factor-activated phosphatidylcholine-specific phospholipase D defines a new and highly conserved gene family. J Biol Chem. 270 29640-3.

Rose K, Rudge SA, Frohman MA, Morris AJ, Engebrecht J (1995). Phospholipase D signaling is essential for meiosis. Proc Natl Acad Sci U S A. 92 12151-5.

Frohman, M.A. (1995). ) Rapid Amplification of cDNA Ends. 381-410.

Frohman MA (1994). On beyond classic RACE (rapid amplification of cDNA ends). 4 S40-58.

Carroll PM, Tsirka SE, Richards WG, Frohman MA, Strickland S (1994). The mouse tissue plasminogen activator gene 5' flanking region directs appropriate expression in development and a seizure-enhanced response in the CNS. 120 3173-83.

Frohman, M.A. (1994). ) Cloning PCR products: Strategies and tactics. In: PCR. The Polymerase Chain Reaction. 14 - 37.

Frohman MA (1993). Rapid amplification of complementary DNA ends for generation of full-length complementary DNAs: thermal RACE. Methods Enzymol. 218 340-56.

Frohman MA, Martin GR, Cordes SP, Halamek LP, Barsh GS (1993). Altered rhombomere-specific gene expression and hyoid bone differentiation in the mouse segmentation mutant, kreisler (kr). 117 925-36.

Frohman, M.A., Dickinson, M.E., Hogan, B.L.M., and Martin, G.R. (1993). Localization of two new and related homeobox-containing genes to chromosomes 1 and 5, near the phenotypically similar mutant loci dominant hemimelia (Dh) and hemimelic extra-toes (Hx). 91 :323-325..

Bulfone A, Puelles L, Porteus MH, Frohman MA, Martin GR, Rubenstein JL (1993). Spatially restricted expression of Dlx-1, Dlx-2 (Tes-1), Gbx-2, and Wnt-3 in the embryonic day 12.5 mouse forebrain defines potential transverse and longitudinal segmental boundaries. 13 3155-72.

Frohman MA, Martin GR (1992). Isolation and analysis of embryonic expression of Hox-4.9, a member of the murine labial-like gene family. 38 55-67.

Frohman M, Francfort JW, Cowing C (1991). T-dependent destruction of thyroid isografts exposed to IFN-gamma. J Immunol. 146 2227-34.

Mizobuchi M, Frohman MA, Downs TR, Frohman LA (1991). Tissue-specific transcription initiation and effects of growth hormone (GH) deficiency on the regulation of mouse and rat GH-releasing hormone gene in hypothalamus and placenta. Molecular endocrinology (Baltimore, Md.) 5 476-84.

Frohman, M.A. (). (1990). Rapid Amplification of cDNA Ends (RACE): User Friendly cDNA Cloning. 5 11-15..

Frohman LA, Downs TR, Chomczynski P, Frohman MA (1990). Growth hormone-releasing hormone: structure, gene expression and molecular heterogeneity. 367 81-6.

Frohman MA, Boyle M, Martin GR (1990). Isolation of the mouse Hox-2.9 gene; analysis of embryonic expression suggests that positional information along the anterior-posterior axis is specified by mesoderm. 110 589-607.

Frohman MA, Downs TR, Chomczynski P, Frohman LA (1989). Cloning and characterization of mouse growth hormone-releasing hormone (GRH) complementary DNA: increased GRH messenger RNA levels in the growth hormone-deficient lit/lit mouse. Molecular endocrinology (Baltimore, Md.) 3 1529-36.

Frohman, M.A. and Martin, G.R. (1989). Rapid amplification of cDNA ends using nested primers 1 165-170.

Frohman MA, Martin GR (1989). Cut, paste, and save: new approaches to altering specific genes in mice. Cell (Cambridge) 56 145-7.

Frohman, M.A (1989). Creating full-length cDNAs from small fragments of genes: Amplification of rare transcripts using a single gene-specific oligonucleotide primer. , 28-38..

Frohman, M.A. and Martin, G.R. (1989). Detection of homologous recombinants. 228-236.

Frohman, M.A. () (1989). Rapid amplification of cDNA ends using nested primers, a simple and new technique for cDNA cloning. , .

Martin, G.R. and Frohman, M.A. (1988). The mouse En-1 gene encodes a nuclear protein expressed in the nervous system of the developing embryo. NATO AS 43-52.

Frohman MA, Dush MK, Martin GR (1988). Rapid production of full-length cDNAs from rare transcripts: amplification using a single gene-specific oligonucleotide primer. Proc Natl Acad Sci U S A. 85 8998-9002.

Wolgemuth DJ, Viviano CM, Gizang-Ginsberg E, Frohman MA, Joyner AL, Martin GR (1987). Differential expression of the mouse homeobox-containing gene Hox-1.4 during male germ cell differentiation and embryonic development. Proc Natl Acad Sci U S A. 84 5813-7.

Francfort JW, Barker CF, Kimura H, Silvers WK, Frohman M, Naji A (1985). Increased incidence of Ia antigen-bearing T lymphocytes in the spontaneously diabetic BB rat. J Immunol. 134 1577-82.

Frohman M, Cowing C (1985). Presentation of antigen by B cells: functional dependence on radiation dose, interleukins, cellular activation, and differential glycosylation. J Immunol. 134 2269-75.

Daddona PE, Frohman MA, Kelley WN (1981). Radioimmunoassay of human adenosine deaminase. Methods Enzymol. 74 Pt C 351-8.

Frohman, L.A., Berilowitz, M., Gonzalez, C., Barowsky, H., Rao, R., Lim, V.S., Frohman, M.A. and Thominet, J.L. (1981). Studies of dopaminergic mechanisms in hyperprolactinemic states Vol. 2 39-52..

Daddona PE, Frohman MA, Kelley WN (1980). Human adenosine deaminase and its binding protein in normal and adenosine deaminase-deficient fibroblast cell strains. J Biol Chem. 255 5681-7.

Daddona, P.E., Frohman, M.A. and Kelley, W.N. (1980). Radioimmunochemical analysis of human erythrocyte adenosine deaminase. 3 B.

Frohman MA, Frohman LA, Goldman MB, Goldman JN (1979). Use of protein A--containing Staphylococcus aureus as an immunoadsorbent in radioimmunoassays to separate antibody-bound from free antigen. 93 614-21.

Daddona PE, Frohman MA, Kelley WN (1979). Radioimmunochemical quantitation of human adenosine deaminase. Journal of clinical investigation 64 798-803.

Daddona PE, Frohman MA, Kelley WN (1979). Radioimmunochemical analysis of human erythrocyte adenosine deaminase. Adv Exp Med Biol. 122B 157-62.