Trying to understand Photosynthesis better. I understand the NADP+ is reduced to NADPH in light dependent reactions and NADPH is then recycled back into NADP+ in the Calvin cycle. What I don't understand is where does the NADP+ come from initially?
Specifically I am asking with regards to its presence in the stroma within the chloroplasts of a plant cell. Where do plants get NADP+ from in order to assist in the production of sugar?