Results 141 to 150 of about 4,799 (174)

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

The genetics and physiology of coliphage N4

Virology, 1973
Amber mutants of bacteriophage N4 were isolated and classified into 27 cistrons by complementation tests. A group of 5 cistrons are essential for the synthesis of phage DNA, whereas 22 other cistrons, when defective, permit varying degrees of N4 DNA replication.
openaire   +2 more sources

Coliphage survival in seawater

Water Research, 1985
Abstract The relative survival of coliphages isolated from seawater under controlled conditions in different media, in the laboratory and in the marine environment, was investigated. The results show that the survival under controlled conditions in different media, and also in the sea, is affected by biological and chemical factors.
Juan J. Borrego, Pedro Romero
openaire   +1 more source

Cyclization of coliphage 186 DNA

Journal of Molecular Biology, 1967
Equilibrium and kinetic studies have been made on the cyclization of coliphage 186 DNA. In 0·13 m -Na + , the melting temperature of the cohesive ends ( T m ), i.e. the midpoint of the linear monomer to cyclic monomer transition, occurs at 63°C, which is 12°C above that of λb2b5c DNA in the same medium.
openaire   +2 more sources

The Calcium Requirement of Coliphage T5

The Journal of Immunology, 1949
Abstract Stassano and de Beaufort (1) discovered that the growth of certain phages was inhibited by the presence of citrate in the culture medium, and that this inhibition could be overcome by the addition of calcium salts. Bordet and Renaux (2) investigated a strain of Shiga phage which was unable to lyse the host cells in the presence ...
openaire   +2 more sources

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

Use of coliphages as indicators of water pollution

Canadian Journal of Microbiology, 1973
The feasibility of using coliphages as indicators of sewage pollution was investigated. Standard coliform determinations (MPN) were also made to compare fluctuations in coliforms with fluctuations in their obligate parasites. No consistent relationship was found between coliform and coliphage levels.
M C, Hilton, G, Stotzky
openaire   +2 more sources

Transduction by coliphage λ of the galactose marker

Virology, 1957
Abstract Phages obtained by induction of strain C600 Gal + made lysogenic for λ ++ when infecting strain 112 Gal − sensitive transduce Gal + with low frequency. The strain C600 Gal + is stable; it does not segregate Gal − . The transformed strains are “heterogenotes.” These heterogenotes have the following properties: 1. 1. They are Gal +
openaire   +2 more sources

A genetic study of the temperate coliphage λ

Virology, 1955
Abstract 1. 1. All the known markers in the temperate phage λ are linked to each other. 2. 2. Mating between pairs of intracellular particles occurs at random with respect to partner but is rather rare (average number of rounds of mating 0.5, assuming two reciprocal recombinants are formed simultaneously). 3. 3.
openaire   +2 more sources

Polyconfiguron-model for the A-protein of coliphage MS2

Biochemical and Biophysical Research Communications, 1978
Abstract An algorithm is presented for decoding mRNA to give the tertiary structure of A-protein of MS2 coliphage. The scale model for the A-protein was assembled by stepwise “translation” of each codon into the corresponding amino acid configuron, so that a polyconfiguron composed of the 393 amino acid residues of the A-protein was generated.
openaire   +2 more sources