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Terminal-restriction fragment length polymorphism electropherograms for the 5′-end dsrAB fragments digested with Sau3AI. (A) Fragments obtained from direct amplification with DSR1F/4R of Etang de Berre sediment sample (EBext). (B) Fragments obtained from direct amplification with dsr619AF/1905BR and nested PCR of an Etang de Berre sediment sample (EBint and EBnes). (C) Fragments obtained from nested PCR of Carnoulès acid mine drainage samples (CARN-A and CARN-B).
