Identical to Ribulose bisphosphate carboxylase small chain 1B, chloroplast precursor (EC 4.1.1.39) (RuBisCO small subunit 1B) (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 Ribulose bisphosphate carboxylase small chain F1, chloroplast precursor (RuBisCO small subunit F1) (GB:P27985); contains InterPro domain Ribulose bisphosphate carboxylase, small chain; (InterPro:IPR000894)