Figure 7.
Properties of KAT1 cysteine mutants. (A) Numbered amino acid residues indicate the location of the cysteine substitutions introduced in the KAT1 protein. (B) Macroscopic currents for the different cysteine mutants. Currents were recorded using the cut-open oocyte voltage-clamp technique from oocytes expressing the different cysteine-substituted channels. (C) Normalized G/G max − V relationships for the different cysteine-substituted channels. Solid lines are fit to the G/G max − V data using a Boltzmann function as described in materials and methods. Fitting parameters for the different mutants are given in Table I.