New maltose Blu mutations in Escherichia coli K-12

Mutations That Stimulate flhDC Expression in Escherichia coli K-12.

UNLABELLED Motility is a beneficial attribute that enables cells to access and explore new environments and to escape detrimental ones. The organelle of motility in Escherichia coli is the flagellum, and its production is initiated by the activating transcription factors FlhD and FlhC. The expression of these factors by the flhDC operon is highly regulated and influenced by environmental condit...

malB region in Escherichia coli K-12: characterization of new mutations.

Phenotypic characterization and mapping of more than 50 Mal(-) mutations located in the malB region lead one to divide the site for Mal(-)lambdas mutations (formerly called gene malB) in that region, into two adjacent genetic segments malJ and malK. malJ and malK are both involved in maltose permeation. It is suggested that (i) malK and lamB, the only known gene specifically involved in phage l...

New locus for exopolysaccharide overproduction in Escherichia coli K-12.

A new locus for exopolysaccharide overproduction in Escherichia coli K-12 was mapped by insertion mutagenesis. A 66% linkage to serA, which is located at 62 min on the E. coli K-12 linkage map, was shown by P1 transduction. The polysaccharide produced by the mutant was isolated and was shown to be similar to colanic acid.

Transduction in Escherichia Coli K-12.

SYSTEM of genetic transduction has been discovered in the sexually fertile A K-12 strain of Escherichia coli. This transduction is mediated by lambda, a temperate phage for which K-12 is normally lysogenic. The distinctive features of the lambda-K-12 system include the following: (1) The transductions are limited to a cluster of genes for galactose fermentation. The GaZ loci are closely linked ...

Escherichia coli K-12 F-prime factors, old and new.