Immunogen sequence: SREDRYIELF YFPIPEKKEP CLQGEAESKA SKLFGNYSRD QPIFLRLEDY FWVKTPSAYE Highest antigen sequence identity to the following orthologs: Mouse - 82%, Rat - 82%. Synthesis of alpha-2, 3-linked sialic acid to Gal(beta-1, 3)GalNAc is mediated by