Immunogen sequence: SEEVLAYYCLK HNNIFRALAV CELGGGMTCL AGLMVAISAD VKEVLLTDGN EKAIRNVQDI ITRNQKAGVF KTQKISSCVL RWDNETDVSQ LEG Highest antigen sequence identity to the following orthologs - mouse 87%, rat 88%. Catalyzes the trimethylation of 'Lys-116' in ca