Immunogen sequence: IPASMNYAKA HSKDKKKPQR DSQAQKSPVK SKSTHRIQHN IDYLKHLSKV KKIPSDFEGS GYTDLQERGD NDISPFSGDG QPFKDIPGKG EATGPD Highest antigen sequence identity to the following orthologs: Mouse - 53%, Rat - 48%. Matrix extracellular phosphoglycoprotein (