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the host-dependent restriction of growth of an rna coliphage fi.phage fic is a spontaneous host-dependent mutant of phage fi which is classified into the fourth group of rna escherichia coli phages (rna coliphages). the mutant phage (fic) grows normally in e. coli strain q13 (permissive host), but poorly in strain a/lambda (non-permissive host) (9). attempts to elucidate the regulatory mechanism of growth of the mutant phage in the non-permissive host revealed the following: (a) growth of the mutant phage was specifically restricted in e. coli strains that h ...1977339036
[comparative evaluation of the spectrum of lytic effects of bacteriophages tb, wb, fi, bk 2 and r on various brucella species].the lytic activity of brucella phages tb, wb, fi, bk2 and r on various brucella species has been studied. phage tb has been found to lyse b. abortus, b. suis and b. neotoma, phage fi has proved to be no different from phage tb, while phage wb has shown higher activity in respect of b. suis; phage bk2 has been found to lyse b. abortus and, to a lesser extent, b. suis and b. melitensis; phage r has shown low activity, while splitting out phages capable of lysing b. abortus cultures in the s-form. ...19836837202
[macromolecular organization and biochemical characteristics of the genome of phage fi-1].the molecular weight of phage fi-1 dna is determined by the methods of sedimentation and kinetics of reassociation, as well as from buoyant density values of virion components and specific partial volume of dna (85x10(6) daltons). the spectral analyses showed that the distribution of guanine-cytosine pairs along the whole length of the molecule is gaussian. the dna content in the particle of fi-1 makes up to 41%, which is 7% less as compared to the morphologically related phage t4. the protein c ...1977861307
[3-dimensional structure and physicochemical characteristics of phage fi-1]. 19854075963
[three-dimensional reconstruction of bacterial viruses from electron microscopy data. bacteriophage structure].the structure of bacteriophages from different groups is presented based on the data obtained by the three-dimensional reconstruction, optical diffraction and filtration and electron microscopy techniques. the study made possible to suggest the scheme for the mechanism of sheath molecules rearrangement at contraction of bacteriophage tail sheath, the model of bacteriophage fi-1 connector. the structural elements for difference and relation of various bacteriophages are demonstrated.19892661997
[physicochemical characteristics and macromolecular organization of bacteriophage fi-5 (author's transl)].physico-chemical parameters and features of macromolecular orgnization of fi-5 phage were studied. this virus was shown to contain a molecule of double-strander dna with the standard set of nitrous bases (37.8 mol% gc). the molecule of this dna in situ is characterized by partial disorder of the second structure. phage virions contain about 47% of dna and 53% of protein. the genome of the phage is represented by a dna molecule with molecular weight 65x10(6) daltons and is capable of coding for a ...19751108452
[structure of bacteriophage fi-5+ in the intact state]. 1978648317
[peculiarities of primary and secondary structure of phage fi-1 dna].the composition of nitrous bases of phage fi-1 dna was studied. as is evidenced from the values of buoyant density in cscl (p=1,7093 g/cm(3)), melting temperature (t degrees m=86,05 degrees), spectral parameters and direct chromatographic determination, the dna analysed contains 41,5 mole% pairs of guanine-cystosine. 5-hydroxymethylcytosine and other anomalous bases were not found. chemical identification and jaxtposition of data of buoyant density in cscl and cs2so4 (p=1,4466 g/cm(3)) and t deg ...1977856309
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