The electron flow produced by the reaction center chlorophyll pigments is used to shuttle H + ions across the thylakoid membrane , setting up a chemiosmotic potential used mainly to produce ATP chemical energy ; and those electrons ultimately reduce NADP + to NADPH , a universal reductant used to reduce CO2 into sugars as well as for other biosynthetic reductions .
The electron flow produced by the reaction center chlorophyll pigments is used to shuttle H + ions across the membrane , setting up a chemiosmotic potential used mainly to produce ATP chemical energy ; and those electrons ultimately reduce NADP + to NADPH , a universal reductant used to reduce CO2 into sugars as well as for other biosynthetic reductions .