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G G Meynell

Publications and source records attributed to G G Meynell.

At least 19 recordsLinked to original sources
PubMed1978

Two major groups of colicin factors: their molecular weights.

Colicin factors are thought to fall into two taxonomic groups which differ in, amongst other properties, the molecular weight of the plasmid DNA and the host range of the colicin protein. This hypothesis is supported by the plasmids found in 26 colicinogenic strains. Two small Col factors may have arisen from larger factors, judging from similarities between their colicins.

Bacteriocin Plasmids↗
PubMed1977

Rapid screening for plasmid DNA.

A procedure is described for demonstrating plasmid DNA and its molecular weight, based on rate zonal centrifugation of unlabelled DNA in neutral sucrose gradients containing a low concentration of ethidium bromide. Each DNA species is then visualized as a discrete fluorescent band when the centrifuge tube is illuminated with ultra-violet light. Plasmids exist as closed circular and as relaxed circular molecules, which sediment separately, but during preparation of lysates, closed circular molecules are nicked so that each plasmid forms only a single band of relaxed circles within the gradient.

Centrifugation, Density Gradient↗