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Structural features of the ClpB proteins of E. faecalis. (a) Amino acid sequence deduced from the E. faecalis clpB gene indicating the consensus sequences. (b) Consensus motifs of the ClpB proteins. ATP-1 and ATP-2 represent the Walker-type nucleotide-binding sites: Walker-A is a glycine-containing segment and Walker-B represents hydrophobic segment motifs. I, N-terminal; II and III, middle; and IV and V, C-terminal consensus sequences.
