Immunogen sequence: FKDGKLSNNE WCYCFQKPGG LPCQNEMNRI QKLSKGKSLL GAFIPRCNEE GYYKATQCHG STGQCWCVDK YGNELAGSRK QGAVSCEEEQ ETSGDFGSGG Highest antigen sequence identity to the following orthologs: Mouse - 98%, Rat - 99%. SPOCK1, also known as Testican-1, is a