the data suggest that nitrate reductase consists of at least two protein subunits : a nitrate-inductible subunit as reflected by inductible nadph-cytochrome c reductase , and a constitutive protein which is activated ( as indicated by the appearance of flavine adenine dinucleotide , reduced form ( fadh ( 2 ) ) - and reduced methyl viologen-nitrate reductase activities ) when it combines with the inductible subunit .
C0599220
protein subunits
C0033684
protein