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Analysis of trans-acting proteinase activity of wild-type and mutant forms of PLP2. (A) Alignment of the MHV PLP1 and PLP2 domain amino acid sequences. PLP1 catalytic cysteine and histidine residues and PLP2 predicted catalytic cysteine and histidine residues are shown in boldface. (B) Protein products detected after cotransfection of DNAs encoding the MHV p150 cleavage site substrate and either the wild-type (wt) or a mutant (mut) form of the PLP2 domain, as indicated above the gel.
