The C-terminal domain aggregates RuBisCO, likely by substituting for the actual RuBisCO small subunits in the L8-S8 holoenzyme, effectively cross-linking the RuBisCO in the cell into one large aggregate, termed the procarboxysome.
O dominio C-terminal agrega a RuBisCO, probablemente ao substituír as verdadeiras subunidade pequenas da RuBisCO no holoencima L8-S8, entrelazando a RuBisCO na célula nun gran agregado, denominado procarboxisoma.