Fig. 4. Agonist dose–response curves for chimeras expressed in Xenopus  oocytes. Data are normalized mean ± SEM of peak currents. (A ) glyrho; (B ) rhogly; (C ) rhoα²alone (closed boxes, solid line) and rhoα²co-injected with wild-type GABA^Aβ¹(open triangles, dashed line). See table 1for specific fitted parameters.