Stimulation of L-tryptophan transport by di- and polysaccharides in the small intestine of chicks.

In in vivo and in vitro experiments the effect of various carbohydrates on the absorption of L-tryptophan in the chick small intestine was investigated. On feeding the chicks with semisynthetic diet containing 58.5% of carbohydrates a stimulatory effect of glucose, particularly of starch and saccharose, on the entry of L-tryptophan into the portal vein from the chick gastrointestinal tract has been found.