pH optimum for tobacco prenylcysteine α-carboxyl
methyltransferase. Assays were performed in the presence of 200
μm AGGC or AGC using the following buffers at 100
mm: sodium acetate at pH 5.48, sodium acetate at pH 5.97,
sodium acetate at pH 6.46, Hepes at pH 6.76, Hepes at pH 7.00, and
Hepes at pH 7.61.