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Fig. 4 | BMC Genomics

Fig. 4

From: Highly diverse nirK genes comprise two major clades that harbour ammonium-producing denitrifiers

Fig. 4

Sequence logo diagrams (5′–3′) depicting the degree of nirK sequence variability of F1aCu-R3Cu primer binding regions [33] in (a) Clade I + II nirK, (b) Clade I nirK, and (c) Clade II nirK. The primer sequence is given at the top and copper binding His included in the reverse primers is indicated in red. Diagrams for the primers nirK1F-nirK5R [34] can be found in Additional file 2

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