Immunogen sequence: TPPTMSQPTFP MVPQQLQHQQ HTTVISGHTS PVRMPSLPGW QPNSAPAHLP LNPPRIQPPI AQLPIKTCTP APGTVSNANP Q Highest antigen sequence identity to the following orthologs - mouse 88%, rat 33%. Histone methyltransferase. Methylates 'Lys-4' of histone H3.