Binds to and iincreases the activity of rubisco by the removal of otherwise inhibitory sugar phosphates: RuBP, and in some plants, 2-carboxyarabinitol 1-phosphate.
Source:PMID:10965036,
PMID:2404515,
PMID:10430961
Comment
See also the molecular function term 'ribulose-bisphosphate carboxylase activity ; GO:0016984'.