I know that NADP+ gets reduced to form NADPH, but what exactly is being donated? Is it two individual electrons (from photolysis or the chlorophyll molecules) and a hydrogen ion (proton)? If this is the case, during the Calvin Cycle, do the NADPH molecules donate the same two individual electrons and hydrogen proton from the light-dependent reactions to become NADP+ again? Thanks.
Specifically during non-cyclic photophosphorylation, I know that the chlorophyll already has preexisting NADP+ molecules, water is broken to release 2 hydrogen atoms and 1 oxygen atom (two water molecules break down to form gaseous oxygen that we breath), those 2 hydrogen atoms get sent down and along the Electron Transport Chain via solar energy and then I believe one goes to a protein called ATP synthase and the other goes to photostem 1. After photostem 1 that hydrogen binds to free floating NADP+ molecules to from charged NADPH. This should be the gist of it all but I would also recommend listening to someone else's input as well.