pH值和温度对嗜酸热硫化叶菌脂肪酸组成的影响。
Effects of pH and temperature on the fatty acid composition of bacillus acidocaldarius.
作者信息
De Rosa M, Gambacorta A, Bu'lock J D
出版信息
J Bacteriol. 1974 Jan;117(1):212-4. doi: 10.1128/jb.117.1.212-214.1974.
Abstract
The fatty acid composition of lipid extracts from cells of Bacillus acidocaldarius grown at temperatures of 50 to 70 C and pH values of 2 to 5 was determined by gas chromatography of the methyl esters. The most abundant fatty acids are 11-cyclohexylundecanoic and 13-cyclohexyltridecanoic, followed by anteiso- and iso-heptadecanoic; unsaturated acids are absent. Highly aerated cultures produce more of the iso and anteiso acids and less of the cyclohexyl acids. The effects of temperature and pH are interdependent; at lower pH, increasing temperature raises the proportion of the iso and anteiso acids, but at higher pH the effect of increasing temperature is reversed and the proportion of the cyclohexyl acids is increased.
摘要
通过甲酯的气相色谱法测定了嗜酸热芽孢杆菌在50至70℃温度和2至5的pH值下生长的细胞脂质提取物中的脂肪酸组成。最丰富的脂肪酸是11-环己基十一烷酸和13-环己基十三烷酸，其次是anteiso-和iso-十七烷酸；不存在不饱和酸。高度通气的培养物产生更多的iso和anteiso酸，而环己基酸较少。温度和pH的影响是相互依存的；在较低的pH值下，温度升高会提高iso和anteiso酸的比例，但在较高的pH值下，温度升高的效果相反，环己基酸的比例会增加。
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