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Influence of XcpP on the mutual stabilization of XcpY and XcpZ. E. coli TG1 cells expressing independently or simultaneously genes xcpZ or xcpZ derivatives, xcpY, and xcpP (subcloned in pYZ4) were grown to the end of the exponential growth phase, and proteins were analyzed by immunoblotting using antisera directed to XcpY. wt, wild-type XcpZ; 45, 58, 65, and 128, XcpZ variants. Two independent experiments were performed, and the results were found to be reproducible.
