kloroplastide jagunemises osalev eukarüoodist pärinev GTPaasi aktiivsusega kloroplastide välismembraaniga seotud valkude rõngas, Dynamin-related proteins (DRPs) are key components of the organelle division machineries, functioning as molecular scissors during the fission process. DRP5B/ARC5 has GTPase activity and plays part in chloroplast division.