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16S rRNA gene distribution (normalized values) over the three analyzed depths in the Bothnian Sea sediment profile. Bacterial 16S rRNA is shown for groups with abundances over 2%, archaeal and proteobacterial over 5%. ANME, Anaerobic Methanotrophic Archaea; OAZ, oxic/anoxic interface zone; SMTZ, sulfate methane transition zone; MZ, methanic zone
