Histone variant innovation in a rapidly evolving chordate lineage.

BMC Evol Biol. 2011 Jul 15;11:208. doi: 10.1186/1471-2148-11-208.

Moosmann A, Campsteijn C, Jansen PW, Nasrallah C, Raasholm M, Stunnenberg HG, Thompson EM.

“47 histone genes (6 H4, 10 H3, 15 H2A, 11 H2B and 5 H1 genes) encoding 31 different histone proteins (2 H4, 6 H3, 11 H2A, 7 H2B and 5 H1) were identified.” “There is no H2AX homolog in O. dioica.” (H2AX is implicated in DNA repair). CenH3 is present.