Nucleotide sequence of the small subunit of ribulose-1,5-bisphosphate carboxylase from the conifer Larix laricina

Ribulose-1,5-bisphosphate carboxylase-oxygenase (EC 4.1.1.39) (Rubisco) is the first enzyme in the Calvin cycle pathway for the fixation of CO sub(2) and consists of eight identical large subunits (55 kDa) and eight identical small subunits (15 kDa). Studies on the control of expression of the sequences encoding the small subunit (rbc S)) serve as the basis for much of our understanding of gene regulation in plants. As part of our study we have constructed genomic and foliar cDNA libraries from the conifer Larix laricina (larch), and have identified clones for rbc S sequences from each.