Immunogen sequence: SPPADTSWRR TNSDSALHQS TMTPTQPESF SSGSQDVHQK RVLLLTVPGM EETTSEADKN LSKQAWDTKK TGSRPKSCEV. Transcriptional coactivator for CREB1 which activates transcription through both consensus and variant cAMP response element (CRE) sites. Acts as