Results 201 to 210 of about 10,768 (245)

Biophysical properties of N4 coliphage

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1966
Abstract 1. 1. N4 bacteriophage, a recently isolated lysis-inhibiting phage active on Escherichia coli K12 strains, was purified from lysates with titres ranging from 5 to 10 · 10 11 plaque-forming units/ml, by several cycles of differential centrifugation followed by a final step of equilibrium centrifugation in CsCl.
G C, Schito, G, Rialdi, A, Pesce
openaire   +2 more sources

Risk-based water quality thresholds for coliphages in surface waters: effect of temperature and contamination aging.

Environmental Science: Processes & Impacts, 2019
Coliphages, viruses that infect Escherichia coli, have been used for decades to assess surface water quality yet there is no guideline for interpreting their concentrations. The present study uses a quantitative microbial risk assessment (QMRA) framework
A. Boehm
semanticscholar   +1 more source

Physical characteristics of new coliphages

Canadian Journal of Microbiology, 1974
Seven new bacteriophages for Escherichia coli B, isolated from a farm animal waste lagoon, were characterized in regard to morphology, buoyant density, UV-sensitivity, and heat-sensitivity.
G J, Berg, D L, Berryhill, T K, Borg
openaire   +2 more sources

Lethal lysogenization by coliphage lambda

Virology, 1976
Abstract Mutants of lambda insensitive to epistatic replication inhibition by repressor ( ri c ) were studied during lysogenization of sensitive host cells. These mutants establish defective complexes which neither lyse nor multiply as lysogens.
M, Ohashi, W F, Dove
openaire   +2 more sources

Structural proteins of coliphage N4

Virology, 1973
Abstract The proteins from bacteriophage N4, dissociated with 1% SDS and 2% 2-mercaptoethanol, have been investigated by SDS polyacrylamide gel electrophoresis. Ten different polypeptide chains were identified in the purified virus. The molecular weights of the protein monomers estimated by coelectrophoresis with marker proteins ranged from 31,000 to
M, Giraldi, M, Toni, G C, Schito
openaire   +2 more sources

RNA in Coliphage T5

Nature, 1973
VIRUSES are thought to have either RNA or DNA as their genetic material, but not both1, although oncogenic RNA viruses containing reverse transcriptase have been shown to contain some DNA. I did not expect to find that coliphage T5, a DNA-containing virus, also contained some RNA.
openaire   +2 more sources

Molecular weights of coliphages and coliphage DNA

Journal of Molecular Biology, 1970
Frank C. Bancroft, David Freifelder
  +5 more sources

The c-region of coliphage 21

Virology, 1967
Abstract Clear-plaque mutants of a 21-λ hybrid have been isolated. The mutants fall into 4 morphological classes and 3 of the classes behave as single complementation groups, cI, cII, and cIII. The map order, based on 3 point tests, is cIII, cI, cII … mi.
M, Liedke-Kulke, A D, Kaiser
openaire   +2 more sources

Coli and Coliphage

Nature, 1973
Experiments in Molecular Genetics. By Jeffrey H. Miller. Pp. xv + 466. (Cold Spring Harbor Laboratory: Cold Spring Harbor, New York, 1972.)
openaire   +1 more source

Active Form of Two Coliphage Repressors

Nature, 1970
Two coliphage repressers were originally isolated as monomeric proteins. Here it is shown that these repressers attach to DNA in the form of oligomers, possibly as tetramers, and that these oligomers are in rapid equilibrium with the monomers.
V, Pirrotta, P, Chadwick, M, Ptashne
openaire   +2 more sources