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Alignment of predicted amino acid sequence of pcsA with the consensus sequence of fatty acid:CoA ligases (Acs; http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=COG0365&version=v1.63). The conserved signature motif of the acyl-adenylate/thioester-forming enzyme family is underlined, and the conserved lysine residue K638 required for acyl-AMP synthesis is in boldface type and underlined.
