Photosynthetic bacteria are also capable of reducing electron carriers such as NAD, via a linear reaction similar to the electron transmission which occurs during plant photosynthesis (Figure 2-2).
Energy conversion, ATP synthesis and the production of both CO2 and hydrogen on the other hand, are not unique to photosynthetic organisms, but occur in all types of microorganisms, and are in fact similar to the respiratory processes which occur in mitochondria of higher organisms.
Nicotinamide adenine dinucleotide - Wikipedia
Nicotinamide adenine dinucleotide phosphate or NADPH is a reduced that plays a key role in the synthesis of carbohydrates in photosynthetic organisms. It is the reduced form of NADP+ and as such is a high energy molecule that helps drive the . NADPH is formed during with the use of light energy in the of . It then represents an energy currency that can be used in the Calvin cycle and subsequent reactions to produce carbohydrates.