Interrelationships between amino acids absorbed from the isolated pig caecum in situ
Olszewski, A.
Acta Physiologica Polonica 29(2): 167-176
1978
ISSN/ISBN: 0044-6033 PMID: 654928 Document Number: 130850
Amino acids are absorbed selectively from the cecum of pigs depending on their qualitative and quantitative composition in the intestinal contents. Significant interrelationships were found between the absorption of different amino acids. Tyrosine exerted a significant stimulating effect on the absorption of most amino acids from the cecum, e.g., Asp-NH2, Ser, Thr, Arg, Asp, Glu. An increased absorption of Ser and Thr caused incrased tyrosine and arginine absorption. Serine and threonine competed in the process of absorption, and the activity of serine in this process was much higher than that of threonine. Secretion of amino acids back into the intestinal lumen was demonstrated.