Immunogen sequence: TANRMRNRLQV FPELETNAVL MVDDDTLIST PDLVFAFSVW QQFPDQIVGF VPRKHVSTSS GIYSYGSFEM Highest antigen sequence identity to the following orthologs - mouse 89%, rat 90%. EXTL2 is a glycosyltransferase required for the biosynthesis of heparan-s