carbon chain in their acyl moieties. The promoting action of N-acylamino acids was not influenced by the presence of N-ethylmaleimide or ouabain. The promoting potencies of N-acylamino acids were depressed in the presence of calcium chloride in the rectal loop. The contribution of the calcium ion sequestration capacity of N-acylamino acids to their promoting efficacies is discussed.
用大鼠直肠环技术研究了
氨基酸的N-酰基衍
生物对
氨苄
青霉素钠的直肠吸收的促进作用。在酰基部分具有较长碳链的N-酰基衍
生物显示出更大的促进效力。当在相同碳原子长度的酰基部分上比较时,苯基甘
氨酸和苯丙
氨酸的N-酰基衍
生物的促进能力大于甘
氨酸和丙
氨酸衍
生物的促进能力。N-酰基
氨基酸的促进作用不受N-乙基马来
酰亚胺或
哇巴因的存在的影响。在直肠环中存在
氯化钙的情况下,N-酰基
氨基酸的促进能力受到抑制。讨论了N-酰基
氨基酸的
钙离子螯合能力对其促进功效的贡献。