The linkage of glutamic acid in protein molecules.
The linkage of glutamic acid in protein molecules.
复制标题
蛋白质分子中谷氨酸的连接。
作者：
F. Haurowitz;F. Bursa
和混合培养物的培养物中的培养物以及对阿拉伯乳杆菌Lactobacillaarabino 8 u8产酸的影响。2.细菌的生长大肠杆菌或混合培养物中的任何一种甲基甘草酸在所用浓度下都没有明显影响; Arabino 8 SW被7-甲基化合物显著抑制。3.利用细菌从鸟氨酸或乳酸铵合成烟酰胺。大肠杆菌对2 mm完全抑制，对低浓度的2-、4-、5-和7-甲基异甘草酸抑制作用相对较小，但对相思豆毒素无抑制作用。烟酰胺合成的混合细菌从大鼠盲肠内容物被完全或部分抑制前在2 mr和不受后者化合物。这些发现表明色氨酸参与了烟酰胺的细菌生物合成。
and mixed cultures of rat caecum contents and on the acid production by Lactobacillua arabino8u8 has been studied. 2. Growth of Bact. coli or of mixed cultures was not markedly affected by any one of the methyltryptophans in the concentrations used; that of Lb. arabino8sw was considerably inhibited hy the 7methyl compound. 3. Nicotinamide synthesis from ornithine or ammonium lactate by Bact. coli was completely inhibited by 2 mm and correspondingly less by lower concentrations of 2-, 4-, 5and 7-methyltryptophans, but not by abrin. Nicotinamide synthesis by mixed bacteria from the rat caecum contents was either completely or partly inhibited by the former at 2 mr and not affected by the latter compound. These findings suggest that tryptophan is involved in the bacterial biosynthesis of nicotinamide.