Immunogen sequence: MTAEEMKATE SGAQSAPLPM EGVDISPKQD EGVLKVIKRE GTGTEMPMIG DRVFVHYTGW LLDGTKFDSS LDRKDKFSFD LGKGEVIKAW DI. FKBP4, encoding FK506-binding protein 4, is part of the immunophilin family and plays roles in cellular processes like protein fold