Synonyms:ASF1A, CCG1 interacting factor A, CGI 98, CIA, hAsf1, hAsf1a, hCIA, Histone chaperone ASF1A, HSPC146 Background:Histone chaperone that facilitates histone deposition and histone exchange and removal during nucleosome assembly and disassembly. Cooperates with chromatin assembly factor 1(CAF-1) to promote replication-dependent chromatin assembly and with HIRA to promote replication-independent chromatin assembly. Required for the formation of senescence-associated heterochromatin foci(SAHF) and efficient senescence-associated cell cycle exit.