Calbiochem Suramin, Sodium Salt, A reversible and competitive inhibitor of protein tyrosine phosphatases., Each

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A reversible and competitive inhibitor of protein tyrosine phosphatases. An anti-neoplastic, anti-angiogenic agent that uncouples G-proteins from receptors presumably by blocking their interaction with intracellular receptor domains. Inhibits GDP-GTP exchange, the rate limiting step in the activation of Gα-subunits. A competitive inhibitor of reverse transcriptase. Reported to inhibit topoisomerases I and II. Inhibits Ca2 -ATPase in sarcoplasmic reticulum membranes. Also inhibits the cell-surface binding of various growth factors, including EGF, PDGF, and TGF-β. An inhibitor of phospholipase D (IC50 = 15μM). Reported to interact with ATP-binding enzymes and P2-purinergic receptors. An effective inhibitor of angiogenesis in the calmodulin assay when given in combination with angiostatic steroids.