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||Bacteria Escherichia coli
||Hasona A, Kim Y, Healy FG, Ingram LO, Shanmugam KT. Pyruvate formate lyase and acetate kinase are essential for anaerobic growth of Escherichia coli on xylose. J Bacteriol. 2004 Nov186(22):7593-600. p.7596 table 2PubMed ID15516572
||P.7595 left column 2nd paragraph: "Cell density was determined as the OD at 420 nm after appropriate dilutions (Beckman DU640). Fermentation products and sugars were determined by high-pressure liquid chromatography, using HP 1090 (Hewlett-Packard) fitted with an Aminex HPX-87H column (Bio-Rad Laboratories). The mobile phase was 4 mM H2SO4 at 0.4 ml per min. Organic acids, sugars, and ethanol were detected by a filter photometric detector (210 nm) and/or a refractive index monitor, in series, as described previously (ref 34)."