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Fig. 3. Functional plasticity of glycogen metabolism during sleepwake cycle.
Glycogen synthase activity is induced by sleep deprivation and returns to
normal levels after 3 h recovery. ZT6, undisturbed animals sacrificed 6 h
after light onset; SD6, animals sacrificed at the end of a 6 h sleep
deprivation period; ZT9, undisturbed animals sacrificed 9 h after light onset;
SR3, sleep deprived animals sacrificed after 3 h of sleep recovery. Asterisks,
P<0.01.