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The article provides information on a study on Salmonella enterica serovar Typhimurium (S. typhimurium). It is stated that L-Cysteine is required for the induced antibiotic resistance in actively swarming S. typhimurium. It is noted that the swarm-cell differentiation in the S. typhimurium leads to a biosynthetic mode of growth, despite thriving on a rich medium, and cells that have elevated antibiotic resistance. The study hypothesized that in the cells, the additional cysteine requirement is for use in pathways not directly associated to cell growth. The research suggested that while swarm medium has sufficient cysteine for the growth of S. typhimurium, it does not contain enough for swarm-cell differentiation.

Focuses on a study which investigated the microbial chitinases' ecology and evolution, with an analysis of the marine bacterium Vibrio harveyi. Indepth look at the chitinase genes (chiA); Sequence analysis of chiA; Methodology used to conduct the study; Results of the study.

Examines the ribonucleic acid (RNA) polymerase from Methylobacterium extorquens AM1 cells. Reference to the size of the B,B...,... and ... subunits; Definition of the Methylobacterium extorquens AM1; Detailed information on the biological properties of the Methylobacterium extoquens.

Studies mxbD and mxbM, a pair of putative sensor-regulator required for the oxidation of methanol in Methylobacterium extorquens AM1. Role of the genes in the transcriptional regulation of methanol dehydrogenase; Suggested nucleotide sequence of mxbD; Significance of the deletion analysis.

Focuses on methanol oxidation mutants in Methylobacterium extorquens AM1. Identification of genetic complementation groups; Methylobacterium extorquens; Methylotrophs; Methanol oxidation.