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Alignment of partial amino acid sequences of TrfA/RepA orthologues from plasmids related to RK2 and pMLb. Amino acids matching the beta-binding site consensus sequence are underlined. The vertical arrow indicates the start of the TrfA-33 protein. Sequences are labeled with the plasmid/mobile genetic element of origin or GenBank gi number where the plasmid/mobile genetic element has not been named.
