ribulose bisphosphate carboxylase small chain 1B / RuBisCO small subunit 1B (RBCS-1B) (ATS1B). Identical to Ribulose bisphosphate carboxylase small chain 1B, chloroplast precursor (RBCS-1B) [Arabidopsis Thaliana] (GB:P10796); similar to ribulose bisphosphate carboxylase small chain 2B / RuBisCO small subunit 2B (RBCS-2B) (ATS2B) [Arabidopsis thaliana] (TAIR:AT5G38420.1); similar to chloroplast ribulose-1,5-bisphosphate carboxylase/oxygenase small subunit precursor [Brassica napus] (GB:ABB51649.1); similar to Ribulose bisphosphate carboxylase small chain F1, chloroplast precursor (RuBisCO small subunit F1) (GB:P27985); contains InterPro domai