Immunogen sequence: VKRLKPLFNK SFESTVGQGS DTYIYIFRVC REAGNHTSGA GLVQINKSNG KETVVGRLNE THIFNGSNWI MLIYKGGDEY DNHCGKEQRR AVVMISCNRH TLADNFNPVS EERGKVQDCF YLFE. M6PR is a receptor for mannose-6-phosphate groups on lysosomal enzymes. The receptor forms a hom