Abstract
Summary
The compositions of amino acids liberated by pepsin digestion from egg, rumen protozoal and rumen bacterial protein differed markedly from the amino acid composition of the three protein sources. Total histidine and methionine uptake by rat jejunal rings in vitro in the presence of amino acid mixtures simulating the pepsin liberation patterns differed from histidine and methionine uptake in the presence of amino acid mixtures simulating the three protein sources. The data suggested that in vitro histidine or methionine uptake was primarily dependent on the concentration of these amino acids in the incubation buffer but extent of uptake was modified by the amino acid patterns.
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