Fig. 4.

Apamin potentiation of nerve-mediated contractions is lost in SK2• /• UBSM strips. A: effect of a maximal dose of apamin on 20-Hz evoked electrical field stimulation contractions in a SK2• /• strip. B: lack of effect apamin in a SK2• /• UBSM strip. C: average contraction amplitudes expressed as a percentage of control.