Immunogen sequence: YMLACTPKGDE EQLALPRANS PTGKEGYQAV LQEWEEQHRN YVSSLKRQIA Highest antigen sequence identity to the following orthologs - mouse 88%, rat 88%. CSGALNACT1 transfers 1,4-N-acetylgalactosamine (GalNAc) from UDP-GalNAc to the non-reducing end