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Members of inhibitor of growth (ING) family function in inhibiting cell growth and inducing apoptosis. They are sequence homologous proteins. ING1 is the first identified one, interacting with TP53 and is a component of the p53 signaling pathway. Multiple alternatively spliced transcript variants encoding distinct isoforms of ING1 have been reported. This antibody recognizes all 24/33/47kd isoforms of ING1, but will not bind ING2, 3 or 4.