We here analyzed a sulfur index of Escherichia coli using LC-MS/MS combined with thiol-specific derivatization by monobromobimane. The obtained sulfur index was then applied to evaluate the L-cysteine producer. E. coli cells overexpressing the yciW gene, a novel Cys regulon, accumulated l-homocysteine, suggesting that YciW is involved in L-methionine biosynthesis.
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| http://dx.doi.org/10.1016/j.jbiosc.2014.08.012 | DOI Listing |
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