On February 3, at 10:31 AM PST: In A to Zecora, in the 2nd to last equation using phosphatase, an H in the given product was changed to an OH.
Fluttershy reads through Zecora's alchemical notes with a frown on her face. "Zecora, I have no idea what's going on here!"
"Each reaction is a real-life synthesis, using concepts you should not have missed."
"All of the reactants are correct, but one product you should reject."
"Look carefully and use insight, to find the mistake and change wrong to right."
"The central dogma plus two more, yield a problem quite hardcore."
Hints are available here.