Immunogen sequence: FSFLPSQTSD WFWCQAANNA NVQHSALTVV PPGGDQKMED WQGPLESPIL ALPLYRSTRR LSEEEFGGFR IGNGEVRGRK AAAM Highest antigen sequence identity to the following orthologs: Mouse - 26%, Rat - 23%. Probable B cell-associated cytokine that plays a role i