Figure 1.

Functional binding sites on the GABA receptor. Adapted from the PACT Sedation module (European Society of Intensive Care Medicine http://www.esicm.org webcite). Reprinted from Richards G, Schoch P, Haefely W: Benzodiazepine receptors: new vistas. Seminars in Neuroscience 1991, 3:191–203. ^© 1991 with permission from Elsevier.