RuBisCO operon transcriptional regulator Smed_3919 CBBR_SINMW HTH-type transcriptional regulator CbbR Transcriptional activator for the cbb operon for RuBisCO and other Calvin cycle genes. 313 cbbR MRNVSLRQLRTVEAVCRLGKINLAAEALGLTGPALTLQIQHLERDTGVALFDRTRGGMVPTAYGLAFLEAARAVEDSLAALEDSIGAISGLRTGRLRLGVVSTGKYFAPQLIAAFRDQVPAVEINLFIGNRAEIIAKLRDHEIDIALMGRPPRDFEVRAQVFGDHPLVFIAPAGHPLAGVLEISRERIAREQFLVREKGSGTRISLEIFLSDTPHELEELGTEIASNETIKQAVIAGLGIAFISAHTIEQEVKLGRLVILDVIDTPIRRQWFTVSRLDRAATPAMQAFEQFVLSSGARYLPVVSKPYPANAFG