xau:Xaut_2504 K15576 nitrate/nitrite transport system substrate-binding protein | (GenBank) nitrate-binding protein nrtA precursor, periplasmic
xau:Xaut_2503 K15577 nitrate/nitrite transport system permease protein | (GenBank) nitrate ABC transporter, inner membrane subunit
xau:Xaut_2502 K15578 nitrate/nitrite transport system ATP-binding protein [EC:7.3.2.4] | (GenBank) nitrate ABC transporter, ATPase subunits C and D