Immunogen sequence: DEGWTIVLNE SSQKLGDHGY DNSLPSMHPF LAAHGPAFHK GYKHSTINIV DIYPMMCHIL GLKPHPNNGT FGHTKCLLVD QW Highest antigen sequence identity to the following orthologs: Mouse - 88%, Rat - 88%. NPP4, also known as ENPP4 (ectonucleotide pyrophosphatase