Immunogen sequence: FCSLGTLQFCI DKVNISQNTM SLQFSNGSRH VCLRSGAGSV RPLNGGAGFA GSSACGGSVA GSEFSCALGG GLGSVPGGSH AGGALGNAAC IGFAGSEG Highest antigen sequence identity to the following orthologs - mouse 57%, rat 60%. Essential for the proper assembly of types