Immunogen sequence: ITGKGASGTFQ LKKSGEKPLL GGSLMEYAIL SAIAAMNEPK TCSTTALKKY VLENHPGTNS NYQMHLLKKT LQKCEKNGWM E Highest antigen sequence identity to the following orthologs - mouse 98%, rat 91%. HP1BP3 is the component of heterochromatin, may be involved