Fig. 1. Ratio of glutathione disulfide:total glutathione (GSSG:GSH-eq) levels during the transition from 20 day estivation (time zero) to 24 h active snails H. aspersa. Values are means ± S.E.M. (N=5 for hepatopancreas; N=4 for foot muscle). ^bSignificantly different from the corresponding value for estivating snails, P<0.05.