Immunogen sequence: GVSTSVGLRN ADTLPRLPNA AHPIGLVYTG HRVPSFQLIL YPNLKVPAND FIGHRIVHFG CCRDPNIYCL YPILESQVCA PSFHSGSPAC SSNQSR Highest antigen sequence identity to the following orthologs: Mouse - 23%, Rat - 25%. Homeobox genes encode DNA-binding proteins