Immunogen sequence: VTNQEEAAYIQ EITTADGQTV QHLVTSDNQV QYIISQDGVQ HLLPQEYVVV PEGHHIQVQE GQITHIQYEQ GAPFLQESQI QYVP Highest antigen sequence identity to the following orthologs - mouse 95%, rat 94%. Component or associated component of some histone methylt