Immunogen sequence: RAKFRRNERA MLASRSASLL KSYSQEAAIE QPVAPRPTAL SPDYLSWTAS SPYSTVPPYS PGSSGPATPG VNMANSIASL RLKAKEFSLH HSQVPTVN Highest antigen sequence identity to the following orthologs: Mouse - 92%, Rat - 93%. The paired-class homeobox genes PRX1 and