Not only are two hydrogen ions added each time a water molecule is broken down but other hydrogen ions are being enticed into the thylakoid sac by the PSII electrons as they are being passed over to the PSI complex.
Vesinikioone ei lisandu tülakoidi mitte ainult iga veemolekuli lagundamisega, vaid neid meelitavad sinna ka II fotosüsteemi elektronid, kui neid I fotosüsteemi üle kantakse.