n acetylglutamate allosteric activator of which enzyme of the urea cycle?

Answer 1

In the urea cycle, the rating limiting enzyme is carbomoyl phosphate synthase or CSP-1. It is this enzyme that is allosterically activated by N-acetylglutamate or NAG. In the liver where the urea cycle takes place, NAG concentration determines the rate of urea production.

Answer 2

N-acetyl glutamate synthase is an allosteric enzyme that catalyses the formation of N-acetyl glutamate from glutamate and acetyl coA. The formed N-acetyl glutamate acts as an allosteric cofactor for CPS 1 ( carbomyl Phosphate Synthase 1) enzyme which catalyses the formation of carbomyl phosphate from two molecules of ammonia and bicarbonate Ion.It is the first step in the urea cycle.