Component of the acetyl coenzyme A carboxylase (ACC) complex. Biotin carboxylase (BC) catalyzes the carboxylation of biotin on its carrier protein (BCCP) and then the CO(2) group is transferred by the transcarboxylase to acetyl-CoA to form malonyl- CoA (By similarity). Acetyl-coenzyme A carboxylase carboxyl transferase subunit beta MLKDIFTKKKKYASVPSDQAKHDVPEGIMTKCPKCKKIMLTKELDKNMRVCMNCDYHFPMNAKQRIESLMDEQSFEEFNQGMLSENPLGFPGYLEKLEKDREKTSLNEAVVTGKGTIGGHPAVVAVMDSSFRMGSMGSVVGEKITLAIEKAKADKVPFIIFTASGGARMQEGVLSLMQMAKTSSALKLFSEEQGLIISVMTHPTTGGVSASFASLGDYNFAEPGALIGFAGRRIIEQTIGEKLPEDFQTAEFLLKHGQLDAVIHRDDMKKTLENLLDMHQTGGDIEWLQD ACCD_BACSU accD 290 BSU29210 yttI