Immunogen sequence: RGFVYLQPHSE HQGVVYCRAE AGGRSQISVK YQLLYVAVPS GPPSTTILAS SNKVKSGDDI SVLCTVLGEP DVEVEFTWIF PGQKDERPVT IQDTWRLIHR GLGHTTRISQ SVITVEDFET IDAGYYICTA QNLQGQTTV Highest antigen sequence identity to the following orthologs - mouse 93%, rat 94