[Influence of microflora on the metabolism of L-threonine at the level of the rat digestive tract].

Intestinal tissues are found to incorporate L threonine 14CU at faster rate in the absence of microflora. Most of the radioactivity of the digestive contents occurs in the TCA soluble compounds, except in the coecum and large intestine of the conventional rats where the microflora synthetized its own proteins from the labelled digestive material. Free threonine is the main labelled soluble compound in the conventional rats digestive contents. In the other hand, in the germfree rats digestive contents, radioactivity of the other compounds is found in higher concentration than free threonine.