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Daily variations in serum concentrations of total and free corticosterone and corticosteroid-binding globulin (CBG) were determined at 4 h intervals in male rats maintained on a 12:12 h light/dark cycle (lights on at 05.00 h). Total corticosterone concentrations exhibited a classical rhythm with peak values occurring at the onset of dark (17.00 h). Serum(More)
The development and distribution of peptidase activity in mucosal homogenates of rat small intestine has been investigated. Substrates used were glycyl-L-leucine (GL), L-seryl-L-methionine (SM), and L-leucyl-glycyl-glycine (LGG). During the first 2 weeks of life there was high peptidase activity toward GL and SM in the distal regions of the small intestine.(More)
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