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“Removing CH from the plasma membrane increased tyrosine and threonine phosphorylation of occludin, and transepithelial electrical resistance (TER) within 30 min.”
“By the supplementation of both methionine and threonine to the high tyrosine diet , the enhancement of brain tyrosine and MHPG-SO4 caused by tyrosine was significantly reduced.”
“The supplemented methionine and threonine may cause an increase of tyrosine utilization, because methionine and threonine are the most limiting amino acids in casein, and also may inhibit the uptake of tyrosine into the brain via the blood-brain barrier.”
Journal of nutritional science and vitaminology • 1985 | View Paper
“ Tyrosine exerted a significant stimulating effect on the absorption of most amino acids absorbed from the caecum, e.g. Asp-NH2, Ser, Thr , Arg, Asp, Glu.”
“Equimolar combinations of LYS plus THR were inhibitory at both 0.1 and 0.5 mM. Incorporation of [14C] aspartic acid (ASP) and [3H]tyrosine ( TYR ) was also reduced by 1 mM LYS or THR.”