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首页> 外文期刊>Journal of bacteriology >Alteration of the fatty acid composition of Escherichia coli by growth in the presence of normal alcohols.
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Alteration of the fatty acid composition of Escherichia coli by growth in the presence of normal alcohols.

机译:在正常醇的存在下通过生长改变大肠杆菌的脂肪酸组成。

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The addition of normal alcohols in the series n-butanol to n-octanol to cultures of Escherichia coli ML308 grown on defined or lipid-free medium (at 17, 27, and 37 degrees C) caused an alteration in the fatty acid composition of this organism: the ratio of saturated to unsaturated fatty acids increased. Changes in the relative quantities of individual fatty acid species elicited by increasing concentrations of these alcohols were as follows: (i) myristic acid remained constant: (ii) palmitic acid increased; and (iii) the combined amount of palmitoleic plus cis-methylene hexadecanoic acids changed in a way which was reflected inversely by changes in the amount of cis-vaccenic acid. Comparable changes were not observed when cells were grown in the presence of n-nonanol and n-decanol in the concentration range tested. The changes observed upon addition of normal alcohols (n-butanol to n-octanol) paralleled, in part, the alterations in fatty acid composition observed when growth temperature was increased.
机译:将正丁醇系列中的正丁醇与正辛醇中的正丁醇添加到在限定或无脂质的培养基(17、27和37摄氏度)下生长的大肠杆菌ML308的培养物中,导致该脂肪酸组成的改变生物体:饱和脂肪酸与不饱和脂肪酸的比例增加。这些醇的浓度增加引起的各个脂肪酸种类的相对量变化如下:(i)肉豆蔻酸保持恒定:(ii)棕榈酸增加; (iii)棕榈油酸与顺式-亚甲基十六烷酸的组合量以如下方式改变,该方式通过顺式-庚酸的量的改变而反过来反映。当细胞在正壬醇和正癸醇的浓度范围内生长时,未观察到可比的变化。在添加正构醇(正丁醇至正辛醇)时观察到的变化部分与生长温度升高时观察到的脂肪酸组成变化平行。

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