Immunogen sequence: SNNIAIKGVA RFYRSRKKHL ITTQTEHKCV LDSCRSLEAE GFQVTYLPVQ KSGIIDLKEL EAAIQPDTSL VSVMTVNNEI GVKQPIAEIG RICSSRKV Highest antigen sequence identity to the following orthologs: Mouse - 97%, Rat - 96%. NFS1 (nitrogen fixation 1), also known a