Fig. 3. Comparison of enhancing effects of cyclopropane, isoflurane, and halothane on recombinant α1glycine receptors. Cyclopropane, isoflurane, and halothane (1, 2, and 5 minimum alveolar concentration [MAC]) significantly enhanced the current responses of the glycine receptors to an EC5of glycine. Cyclopropane had roughly two to three times less effect than isoflurane and halothane. Error bars represent SEM; n = 8–13 oocytes.