So this intermediate is known as the acid enzyme intermediate. And in the next step we have the water molecule that joins in the active side and it basically hydrolyzes the cleavage of the peptide bond. So it ultimately breaks this bond here and informs the bond between the oxygen and this carbon. And so in the second step we have the deasylation step. So this acid group is removed from that oxygen. The age from the water molecule is given to that oxygen on the Serene.