pir:VN12_22070 K15576 nitrate/nitrite transport system substrate-binding protein | (GenBank) nrtA; Nitrate transport protein NrtA precursor pir:VN12_22075 K15577 nitrate/nitrite transport system permease protein | (GenBank) cmpB; Bicarbonate transport system permease protein CmpB pir:VN12_22070 K15576 nitrate/nitrite transport system substrate-binding protein | (GenBank) nrtA; Nitrate transport protein NrtA precursor