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HlpB sequence and consensus sequence of HlpB-like proteins from bacteria and phages. Invariant residues are shaded in black, conserved residues are shaded in gray. Plus signs corresponding to the consensus sequences indicate conserved types of amino acids. Residues usually conserved in the HNH domain are underlined in the consensus sequences, with the HNH motifs highlighted in gray. The conserved arginine is not found in HlpB-like proteins and is indicated in parentheses.
