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Next, the electrons that had moved to form the carbonyl transfer back down to reform the carbonyl. Then the diacylglycerol leaving group is protonated by His-257. Following another round of deprotonations, the lone pair on the oxygen of water undergoes a nucleophilic addition to the carbonyl that reformed in the previous step. The electrons that had moved up from the carbonyl come back down to reform it and kick off the Ser, which again induces the chain of deprotonation. The final products of the reaction are the conserved catalytic triad, a

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