Ammonium monooxygenase (amoA)

amoA-1F      GGGGTTTCTACTGGTGGT

Rotthauwe et al. 1997

amoA-2R     CCCCTCKGSAAAGCCTTCTTC

16S rRNA Nitrospira sp. (NSR)

NSR 1113F  CCTGCTTTCAGTTGCTACCG

Dionisi et al. 2002

NSR 1264R  GTTTGCAGCGCTTTGTACCG

Nitrite reductase (nirK)                             

nirK 876       ATYGGCGGVAYGGCGA

Braker et al. 1998

Table 1: The oligonucleotide sequences of the primers.