产品介绍： Assimilatory nitrate reductase (NR, EC.1.6.6.1) catalyses the reduction of nitrate to nitrite in the cytoplasm. Plants contain 2 forms of NR: NADH-NR (most common form in plants and algae, predominantly found in green tissues) and NAD(P)H-NR (uses NADH or NADPH as the electron donor, constitutively expressed in plants at a low level). NADH-NR is a homodimer of two identical subunits (100-115 kDa each, hold together by a Mo-cofactor) each of them coded by up to three genes (NR1-3, NIA1-NIA3).