If NADPH returns to being NADP+, then that means one proton and two electrons have been incorporated into 1,3-BPG. If only one proton and one electron were attached to the carbon in 1,3-BPG (removing phosphate), I’d understand, since there’s a single covalent bond between carbon and hydrogen which establishes stable octets. But there’s another electron hanging around. What happens to this one? Or am I totally mistaken about the whole process?
This is the chemical formula for G3P:
The Lewis diagram below shows the top part:
As stated, NADPH gave off 2 electrons, yet only one is needed to bond with carbon (orange). Where did the other electron disappear to?