these molybdenum enzymes included ( a ) nitrogenase , or its molybdenum-iron protein , from clostridium , azotobacter , and soybeannodule bacteroids , ( b ) bovine liver sulfite oxidase , ( c ) respiratory formate-nitrate reductase from escherichia coli , ( d ) nadh-nitrate reductase from foxtail grass ( setaria faberii ) , and ( e ) fadh ( 2 ) - and reduced methyl viologennitrate reductase preparations from certain neurospora mutants .
C0028174
nitrogenase
C0030016
reductase