Photo-induced electron transfer from photosystem I to NADP+: Characterization and tentative simulation of the in vivo environment

► General cell content of the cyanobacterium Synechocystis sp. PCC 6803 ► Quantification of the protein cascade catalysing the photo-reduction of NADP+ ► Designing ferredoxin photosystem I chimeras with a high electron transfer activity ► NADPH synthesis catalysed by chimeras versus free partners in a crowded medium