Immunogen sequence: MAELMLLSEI ADPTRFFTDN LLSPEDWGLQ NSTLYSGLDE VAEEQTQLFR CPEQDVPFDG SSLDVGMDVS. ATF6 beta(CREBL1) is a transcription factor in the unfolded protein response (UPR) pathway during ER stress. Either as a homodimer or as a heterodimer with