Inhibition of cysteine variants of GSTP1-1 by saliva.

<p>(A) C47S variant (20 pmoles) incubated at 25°C with 70 µl of saliva (open circle) or saliva 1∶20 diluted (open triangle). (B) C101S variant (20 pmoles) incubated with 70 µl saliva (open circle) or saliva diluted 1∶10 (cross). (C) C47S/C101S double variant (20 pmoles) incubated with 70 µl of saliva (open diamond). Each experiment was performed in triplicate (i.e. three different spectrophotometric determinations on the same sample). Error bars represent SEM.