- rbcR [correction of rcbR], a gene coding for a member of the LysR family of transcriptional regulators, is located upstream of the expressed set of ribulose 1,5-bisphosphate carboxylase/oxygenase genes in the photosynthetic bacterium Chromatium vinosum. Viale, A.M., Kobayashi, H., Akazawa, T., Henikoff, S. J. Bacteriol. (1991)