Cited by 4.1k
DuPont (United States)
Publishes on Microbial Community Ecology and Physiology, Microbial Metabolic Engineering and Bioproduction, Enzyme Structure and Function. 240 papers and 10.8k citations.
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Composition and organization of the bacterial cell structure and function of bacterial cell parts assembly and polymerization - the bacterial interior assembly and polymerization - the bacterial envelope biosynthesis and fueling quest for food growth of cells and populations the effects of temperature, pressure and pH genetic adaptation - the genome and its plasticity genetic adaptation - genetic exchange and recombination co-ordination of metabolic reactions regulation of gene expression - individual operons regulation of gene expression - multigene systems and global regulation cell cycle growth rate as a variable cellular differentiation physiological ecology answers to study questions literature cited.
Marr, Allen G. (University of California, Davis) and John L. Ingraham. Effect of temperature on composition of fatty acids in Escherichia coli. J. Bacteriol. 84:1260-1267. 1962.-Variations in the temperature of growth and in the composition of the medium alter the proportions of individual fatty acids in the lipids of Escherichia coli. As the temperature of growth is lowered, the proportion of unsaturated fatty acids (hexadecenoic and octadecenoic acids) increases. The increase in content of unsaturated acids with a decrease in temperature of growth occurs in both minimal and complex media. Cells harvested in the stationary phase contained large amounts of cyclopropane fatty acids (methylenehexadecanoic and methylene octadecanoic acids) in comparison with cells harvested during exponential growth. Cells grown in a chemostat, limited by the concentration of ammonium salts, show a much higher content of saturated fatty acids (principally palmitic acid) than do cells harvested from an exponentially-growing batch culture in the same medium. Cells grown in a chemostat, limited by the concentration of glucose, show a slightly higher content of unsaturated fatty acids than cells from the corresponding batch culture. The results do not indicate a direct relation between fatty acid composition and minimal growth temperature.