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44-amino-acid E5 transforming protein of bovine papillomavirus requires a hydrophobic core and specific carboxyl-terminal amino acids
The small size of the E5 protein, its lack of similarity to other transforming proteins, and its ability to tolerate many amino acid substitutions implies that it transforms cells via a novel mechanism.
Electron Microscopy of Pseudomonas φ6 Bacteriophage
φ6 bacteriophage from Pseudomonas phaseolicola has a pleomorphic shape due to an outer layer of lipid. This layer was removed with organic solvents or sodium dodecyl sulfate revealing a 50-nm cubic
Bacteriocin Production by Transformable Group H Streptococci
STH(1), which is readily distinguishable from competence factor and bacteriophage activity, appears to have no role in the initiation of the competent state in strain Wicky, and the presence of this factor in Challis culture supernatant fluids indicates that a reevaluation of earlier studies performed with the Challis-Wicky transformation system may be necessary.
Properties of a Streptococcus sanguis (Group H) Bacteriocin and Its Separation from the Competence Factor of Transformation
It appears, therefore, that initiation of the competent state for transformation in strain Wicky is not necessarily accompanied by gross alterations in cell growth and an association-dissociation relationship between macromolecules of 28,000 to 30,000 molecular weight is suggested.
Evaluation of Antibiotic Efficacy Using Electron Microscopy: Morphological Effects of Guanylureido Cephalosporin, Chlorobenzoylureido Cephalosporin, BL-P1654, and Carbenicillin on Pseudomonas
The response of Pseudomonas aeruginosa to carbenicillin, BL-P1654, and two cephalosporins (112384 and 112883) was evaluated by minimal inhibitory concentration determinations, [14C]leucine uptake
Alteration of macromolecular synthesis and membrane permeability by a Streptococcus sanguis bacteriocin.
This work exposed sensitive strain Wicky cells to Challis streptocin and observed macromolecular synthesis and membrane permeability.
Evaluation of Antibiotic Efficacy Using Electron Microscopy: Morphological Effects of Guanylureido Cephalosporin, BL-P1654, and Carbenicillin on Escherichia coli
Early response of Escherichia coli to minimal inhibitory concentrations of 112883, BL-P1654, and carbenicillin was determined by [14C]leucine uptake and scanning electron microscopy morphology
Determination of the Rate of Transformation from Growth Curves of Transformed Streptococci
The new technique, which involves analysis of the growth response of transformed streptococci in liquid medium containing streptomycin, is independent of chain length fluctuations and is demonstrably more accurate than the standard plating method.