The red fluorescent pCB1636-ToxA-DsRedExp-TrpC plasmid was constructed by transferring theToxA-DsRedExp-TrpC fragment from the pUC-ToxA-DsRedExp-TrpC plasmid (unpublished work) into pCB1636 vector (A. Amnuaykanjanasin, personal communication) at theHindIII andEcoRI restriction sites.