Unrooted phylogenetic tree of the translated products of
repA genes from the extended RepFIIA family. Alignments
were generated using the CLUSTAL program (DNAStar). Incompatibility
groups are shown in parentheses. The replication initiator protein from
rolling-circle replicating plasmid pT181 (31, 32) is
included as an unrelated protein for a control. Buchnera
aphidicola plasmids (50, 58) and their RepA
(GenBank) accession numbers are as follows: pBPp1, CAA07300; pBTs1,
CAA72701; and pBTc1, CAA72709. Other plasmids and their RepA (GenBank)
accession numbers are as follows: pCD1, AAC69762; pYVe227, AF102990;
pNR1, CAA26168; pSU316, AAA98204; pCol1b-P9, AAA23191;
pMU707, AAA98176; pMU407.1, AAA87028; pR387, AAA98310; pYVe8081,
AY026194; pYVeWA, AY026195; and p307, AAB17112.