Synonyms:ANP32B, APRIL, PHAPI2, Silver stainable protein SSP29, SSP29 Background:Multifunctional protein working as a cell cycle progression factor as well as a cell survival factor. Required for the progression from the G1 to the S phase. Anti-apoptotic protein which functions as a caspase-3 inhibitor. Has no phosphatase 2A(PP2A) inhibitor activity(By similarity). Exhibits histone chaperone properties, stimulating core histones to assemble into a nucleosome.