results are consistent with the hypothesis that nit-3 is the structural gene for nitrate reductase , nit-1 specifies in part of molybdenum containing moiety which is responsible for the nit-3 gene product dimerising to form nitrate reductase , nit-4 and nit-5 are regulator genes whose products are involved in the induction of both nitrate reductase and nitrite reductase and nit-2 codes for a generalised ammonium activated repressor protein .
C0017362
regulator genes
C1336789
repressor