Nardilysin (EC 3.4.24.61, N-arginine dibasic convertase, NRD-convertase) is an enzyme. This enzyme catalyses the following chemical reaction Nardilysin (EC 3.4.24.61, N-arginine dibasic convertase, NRD-convertase) is an enzyme. This enzyme catalyses the following chemical reaction This enzyme is present rat brain and testis.