Immunogen sequence: IAPLLCILSY NFNTFAILNV YSKLTMFCTT NSLPMDLLLK QGSLKQEVES FCYQIVSESN DQKVGILQSE DKQLQPSVSK KSEGELSR Highest antigen sequence identity to the following orthologs: Mouse - 21%, Rat - 26%. This gene is unusual in that its coding sequence is