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DGGE of positive PCR products obtained after amplification using strain-specific primers for Am-N (A) and Am-H (B). Lanes 1 to 8, separated amplification products obtained from samples of various A. pompejana epibiont biomass and hydrothermal chimney samples as listed in Table 1. Lane 9, positive controls (Am-N in A, Am-H in B). A slight frown occurred in the gel shown in panel B.
