Before revision:  We report the first experimental realization of a sigmoid shape response in one of the gate inputswhich is a desirable shape for biocomputing application as it allows reduction of the analog noise .
After revision:  We report the first experimental realization of a sigmoid shape response in one of the inputs. The logic gate is realized with electrode-immobilized glucose-6-phosphate dehydrogenase enzyme that catalyzes a reaction corresponding to the Boolean AND functions .