FIGURE 6.
Ptc7p dephosphorylates Coq7p in vivo. A and B, Coq7p phosphorylation in mutant ptc7 strain. V5-tagged versions of Coq7p were introduced into wild-type and mutant ptc7 yeast. Mitochondrial samples were isolated and analyzed. A, left, Coomassie Blue staining. Right, phosphoprotein determination by Pro-Q Diamond staining. Bottom, Coq7p-V5 immunodetection. M, molecular weight marker. B, mitochondrial samples were analyzed by Coq7p-V5 immunoprecipitation and two-dimensional isoelectric focusing analysis. Left, Pro-Q Diamond staining. Right, Coomassie staining. Bottom, Coq7p-V5 immunodetection.