abstract：:Three plaque isolates of SV40 strain 777 and 1 plaque isolate of strain 776 were grown to high-titer stocks and serially passaged, undiluted, in monkey BS-C-1 cells. In each case, the serial passaging procedure resulted in the accumulation of closed-circular SV40 DNA molecules containing covalently linked sequences ho...

journal_title：Journal of virology

authors： Lavi S,Rozenblatt S,Singer MF,Winocour E

更新日期：1973-09-01 00:00:00

abstract：:The temperature-sensitive defects of virus mutants isolated from L cells persistently infected with Newcastle disease virus (NDV) were analyzed. Genetic grouping of the mutants by complementation tests was attempted by using several different methods, including yield analysis, RNA synthesis, and heterozygote formation...

journal_title：Journal of virology

authors： Preble OT,Youngner JS

更新日期：1973-09-01 00:00:00

abstract：:Co-infection of neonatal BALB/c mice with Friend virus (FV) complex (containing defective spleen focus-forming virus [SFFV] and endogenous N-tropic leukemia-inducing helper virus [LLV-F]) and B-tropic Tennant leukemia virus (TenLV) resulted in the inhibition of LLV-F by the Fv-1(b) gene and recovery of a TenLV pseudot...

journal_title：Journal of virology

authors： Eckner RJ

更新日期：1973-09-01 00:00:00

abstract：:The synthesis of viral RNA by wild-type vesicular stomatitis virus (L(1)VSV) and a small, plaque-size mutant (S(2)VSV) was studied in vitro and in chicken embryo (CE) and mouse L-cell cultures. Virus-specific RNA synthesized in CE or L cells infected with either L(1) or S(2)VSV at low multiplicity was of the same size...

journal_title：Journal of virology

authors： Wertz GW,Levine M

更新日期：1973-08-01 00:00:00

abstract：:Interallelic complementation between certain temperature-sensitive mutants of gene 42 of bacteriophage T4 was demonstrated by measuring the incorporation of labeled thymine into DNA. ...

journal_title：Journal of virology

authors： Chiu CS,Greenberg GR

更新日期：1973-08-01 00:00:00

abstract：:Nonglucosylated and fragmented T4 DNA shows a gene-specific variation in transformation efficiency. ...

journal_title：Journal of virology

authors： McNicol LA

更新日期：1973-08-01 00:00:00

abstract：:In Escherichia coli B infected with phage T4 with mutations in gene 55 the shut-off of synthesis of two early enzymes was found to be delayed 10 to 15 min as compared to wild-type T4 infection. The kinetics of early enzyme formation was very similar to that obtained after DNA-negative mutant infection. The transcripti...

journal_title：Journal of virology

authors： Bolund C

更新日期：1973-07-01 00:00:00

abstract：:The wild-type strain of vesicular stomatitis virus (VSV) contains in its complete virion (VSV-1, B particles) a minus strand RNA. The principle defective particle of the wild-type strain (VSV-111, T particles) contains a shorter minus strand, homologous to part of the VSV-1 genome. Neither virion contains any detectab...

journal_title：Journal of virology

authors： Roy P,Repik P,Hefti E,Bishop DH

更新日期：1973-06-01 00:00:00

abstract：:Four new nondefective adenovirus 2 (Ad2)-simian virus 40 (SV40) hybrid viruses have been isolated. Although these viruses (designated Ad2(+)ND(2), Ad2(+)ND(3), Ad2(+)ND(4), and Ad2(+)ND(5)) were clonal derivatives of the same Ad2-SV40 hybrid population, they differ significantly from each other and from the previously...

journal_title：Journal of virology

authors： Lewis AM Jr,Levine AS,Crumpacker CS,Levin MJ,Samaha RJ,Henry PH

更新日期：1973-05-01 00:00:00

abstract：:Sindbis virus was iodinated by using the enzyme lactoperoxidase, an iodination technique which labels only surface proteins. By this technique, the two viral glycoproteins are labeled, and the internal viral protein is not. The two glycoproteins are iodinated to strikingly different extents. This difference in suscept...

journal_title：Journal of virology

authors： Sefton BM,Wickus GG,Burge BW

更新日期：1973-05-01 00:00:00

abstract：:The initiation of RNA transcription by the virion-bound RNA transcriptase of vesicular stomatitis virus has been examined. Multiple initiation sequences have been observed, two of which have been characterized (pppApCpGp... and pppGpCp...) suggestive of a transcription process which can start at different sites along ...

journal_title：Journal of virology

authors： Roy P,Bishop DH

更新日期：1973-04-01 00:00:00

abstract：:Differential effect of various metabolic inhibitors on the development of hemadsorption activity and virus formation in cells infected with Newcastle disease virus (NDV) was investigated. It was found that, in BHK-21 cells infected with NDV, cycloheximide did not prevent the development of hemadsorption activity, wher...

journal_title：Journal of virology

authors： Nagai Y

更新日期：1973-04-01 00:00:00

abstract：:We have presented a new approach to studying bacteriophage T4 head maturation. Using a modified M-band technique, we have shown that progeny deoxyribonucleic acid (DNA) was synthesized on the host cell membrane throughout infection. This DNA was released from the membrane later in infection as the result of formation ...

journal_title：Journal of virology

authors： Siegel PJ,Schaechter M

更新日期：1973-03-01 00:00:00

abstract：:Kilham rat virus (KRV) contains linear, single-stranded DNA in the virion. The fate of radioactive viral DNA was followed after infection of monolayer cells. Within 60 min after infection of cells, 28 to 42% of the parental viral DNA is converted to a new form. This new DNA form is believed to be double stranded and l...

journal_title：Journal of virology

authors： Salzman LA,White W

更新日期：1973-02-01 00:00:00

abstract：:A procedure has been developed for the isolation of Newcastle disease virus (NDV) envelope proteins. The two surface glycoproteins and the non-glycosylated membrane protein were solubilized with 2% Triton X-100 and 1 m KCl. Removal of the KCl by dialysis yielded by precipitation a pure preparation of the non-glycosyla...

journal_title：Journal of virology

authors： Scheid A,Choppin PW

更新日期：1973-02-01 00:00:00

abstract：:Cycloheximide and 6-azauridine were employed to study the time course of measles virus protein and nucleic acid syntheses in AV3 cells. Synthesis of ribonucleic acid (RNA) essential for infectivity was first detected at 6 hr and increased concurrently with the formation of essential protein. Maximum levels of virus-sp...

journal_title：Journal of virology

authors： Portner A,Bussell RH

更新日期：1973-01-01 00:00:00

abstract：:The XC rat cell line was found to support the replication of a strain of the Moloney murine sarcoma-leukemia virus. In growth curve experiments cytopathology was paralleled by the production of murine sarcoma virus and leukemia virus progeny having the biologic, antigenic, and biophysical properties of the infecting v...

journal_title：Journal of virology

authors： Trowbridge ST,Benyesh-Melnick M,Biswal N

更新日期：1973-01-01 00:00:00

abstract：:The techniques of deoxyribonucleic acid-ribonucleic acid (DNA-RNA) hybridization and immunological precipitation were used to compare the synthesis of adenovirus-specific macromolecules in African green monkey kidney (AGMK) cells infected with adenovirus, an abortive infection, and coinfected with both adenovirus and ...

journal_title：Journal of virology

authors： Lucas JJ,Ginsberg HS

更新日期：1972-12-01 00:00:00

abstract：:By inhibiting techniques using indirect immunofluorescence tests and indirect immunoelectron microscopy, the G(Gross) soluble antigens (GSA) in the body fluids of AKR and C58 mice, which have a high incidence of spontaneous leukemia, were classified according to the known specificity of G antigens in the murine Gross ...

journal_title：Journal of virology

authors： Aoki T,Herberman RB,Johnson PA,Liu M,Sturm MM

更新日期：1972-12-01 00:00:00

abstract：:AV3 cells (continuous human amnion) infected with the Onderstepoort strain of canine distemper virus produced cell fusion within 2 to 5 hr when added to AV3 cell monolayers. An apparent requirement for intact, infected cells was demonstrated by showing that (i) frozen-and-thawed infected cells failed to induce fusion,...

journal_title：Journal of virology

authors： Rankin AM,Fisher LE,Bussell RH

更新日期：1972-12-01 00:00:00

abstract：:A ribonucleoprotein particle containing about 20% ribonucleic acid (RNA), and containing little if any phospholipid or glucosamine, was recovered in high yield after treatment of Schmidt-Ruppin strain of Rous sarcoma virus and B77 virus with the nonionic detergent Nonidet P-40. This structure, which probably derives f...

journal_title：Journal of virology

authors： Davis NL,Rueckert RR

更新日期：1972-11-01 00:00:00

abstract：:The ribonucleoprotein (RNP) internal components of influenza virus were separated into distinct size classes by sedimentation in glycerol gradients and examined by electron microscopy by using positive staining with uranyl acetate. The large RNP have a peak in length distribution at 90 to 110 nm, the medium, at 60 to ...

journal_title：Journal of virology

authors： Compans RW,Content J,Duesberg PH

更新日期：1972-10-01 00:00:00

abstract：:Evidence is presented by use of radiolabeling and pancreatic and T1 ribonuclease digestion that some of the ribonucleic acid specified by herpes simplex virus contains polyadenylic acid sequences. The polyadenylic sequences are not transcribed from viral DNA. ...

journal_title：Journal of virology

authors： Bachenheimer SL,Roizman B

更新日期：1972-10-01 00:00:00

abstract：:When mouse L cells are infected for 22 hr with vesicular stomatitis virus (VSV), a ribonucleic acid-containing enveloped virus, greater than 70% of the major histocompatibility antigen (H-2), is no longer detectable by the method of inhibition of immune cytolysis. Infected cells prelabeled with (14)C-glucosamine also ...

journal_title：Journal of virology

authors： Hecht TT,Summers DF

更新日期：1972-10-01 00:00:00

abstract：:By means of both electron microscopy and plaque assay techniques, 10(-3)m Zn(2+) has been shown to reduce the adsorption rate of male-specific filamentous deoxyribonucleic acid bacteriophages to the tips of F pili. In contrast, 10(-3)m Zn(2+) did not affect the adsorption of male-specific ribonucleic acid phages to th...

journal_title：Journal of virology

authors： Ou JT,Anderson TF

更新日期：1972-10-01 00:00:00

abstract：:A vaccinia-directed deoxyribonucleic acid (DNA) polymerase has been partially purified from the cytoplasmic fractions of virus-infected HeLa cells. The utilization of natural and synthetic templates by this enzyme resembles that of the host cell DNA-dependent DNA polymerases. The vaccinia DNA polymerase cannot copy ri...

journal_title：Journal of virology

authors： Citarella RV,Muller R,Schlabach A,Weissbach A

更新日期：1972-10-01 00:00:00

abstract：:Ten bacteriophages that attack and lyse saprophytic strains of Bdellovibrio bacteriovorus were isolated. Morphological, serological, and host-range studies revealed that there were four different bdellovibrio phages present among the isolates. One of the phages lysed a strain of B. bacteriovorus that requires the pres...

journal_title：Journal of virology

authors： Althauser M,Samsonoff WA,Anderson C,Conti SF

更新日期：1972-09-01 00:00:00

abstract：:Nonpermissive 3T3 cells were infected with purified superhelical simian virus 40 (SV40) deoxyribonucleic acid I (DNA I). One hour after infection, approximately 60% of the intracellular SV40 DNA was converted to relaxed forms. One day after infection, all intracellular SV40 DNA was present as slow-sedimenting material...

journal_title：Journal of virology

authors： Collins CJ,Sauer G

更新日期：1972-09-01 00:00:00

abstract：:The mechanism by which simian virus 40 converts the abortive adenovirus type 7 infection of monkey cells into an efficient lytic infection has been investigated. Analysis of ribonucleic acid (RNA) synthesis during unenhanced and enhanced infection of monkey cells has shown that adenovirus RNA synthesized in the aborti...

journal_title：Journal of virology

authors： Fox RI,Baum SG

更新日期：1972-08-01 00:00:00

abstract：:A Staphylococcus aureus strain was successively cured of three prophages. A lysogenic conversion by a group A phage to production of Panton-Valentine leucocidin and by a group F phage to staphylokinase production could be demonstrated. ...

journal_title：Journal of virology

authors： van der Vijver JC,van Es-Boon M,Michel MF

更新日期：1972-08-01 00:00:00

abstract：:HeLa cells infected with human rhinovirus type 2 synthesize a mixture of single-and double-stranded ribonucleic acid (RNA). The RNA synthesized by the membrane-bound RNA polymerase complex in vitro is also a mixture of single- and double-stranded RNA, whereas the deoxycholate-treated RNA polymerase complex synthesized...

journal_title：Journal of virology

authors： Yin FH,Knight E Jr

更新日期：1972-07-01 00:00:00

abstract：:The small defective T particle of vesicular stomatitis virus (VSV-111) has no detectable enzyme activity when assayed at 31 C, although qualitatively it possesses all the virion proteins found in complete VSV-1 virions. With VSV-1 transcription product ribonucleic acid (RNA), it is shown that the VSV-111 RNA is identi...

journal_title：Journal of virology

authors： Roy P,Bishop DH

更新日期：1972-06-01 00:00:00

abstract：:Mutants (N(-)nin) of bacteriophage lambda in which the N gene product is not required for growth on wild-type Escherichia coli do not plate on recA bacterial mutants. Secondary mutants, selected for growth on recA, lie within the immunity region to the right of gene cI and appear identical to the cro mutants of Eisen ...

journal_title：Journal of virology

authors： Court D,Campbell A

更新日期：1972-06-01 00:00:00

abstract：:The antiviral activity of the double-stranded complex poly(rI) . poly(rC) in cell culture was restored or even surpassed if the constituent homopolymers were administered separately. Poly(rI) primed the cells for the antiviral activity of poly(rC) and poly(rC) primed for poly(rI), but neither poly(rI) nor poly(rC) pri...

journal_title：Journal of virology

authors： De Clercq E,De Somer P

更新日期：1972-05-01 00:00:00

abstract：:The Group B Staphylococcus phage P11-M15 is shown to be 51% protein and 49% deoxyribonucleic acid (DNA). The intact virion has a molecular weight of 66.7 x 10(6) daltons. The purified viral DNA has a molecular weight of 32.7 x 10(6) daltons. The intact virion is shown to be composed of a polyhedral head which is attac...

journal_title：Journal of virology

authors： Brown DT,Brown NC,Burlingham BT

更新日期：1972-04-01 00:00:00

abstract：:Studies on deoxyribonucleic acid purified from the granulosis virus of Trichoplusia ni have revealed the presence of a closed, double-stranded superhelix which sediments at 95S relative to relaxed circles (74S) and linear (60S) forms. Molecular weight estimates show that this insect virus deoxyribonucleic acid has a s...

journal_title：Journal of virology

authors： Summers MD,Anderson DL

更新日期：1972-04-01 00:00:00

abstract：:Evidence is presented that, in frog virus 3-infected BHK cells, inhibition of ribonucleic acid (RNA) synthesis is paralleled by a decreased activity of host cell RNA polymerase II, while the template ability of host cell nuclei and chromatin is unaffected. ...

journal_title：Journal of virology

authors： Campadelli-Fiume G,Costanzo F,Mannini-Palenzona A,La Placa M

更新日期：1972-04-01 00:00:00

abstract：:Clones of virogenic simian virus 40 (SV40)-transformed hamster kidney cells were exposed to medium deficient in the essential amino acids leucine, arginine, or methionine. Infectious virus was induced after deprivation periods of from 24 to 32 hr. The highest yields of infectious SV40 were obtained from cultures depri...

journal_title：Journal of virology

authors： Kaplan JC,Wilbert SM,Black PH

更新日期：1972-03-01 00:00:00

abstract：:The synthesis of different viral ribonucleic acid (RNA) species was studied in chick embryo (CE) and mouse L-cell cultures infected with the Herts strain of Newcastle disease virus (NDV(o)) and a mutant isolated from persistently infected L cells (NDV(pi)). In CE cell cultures, both viruses synthesized significant amo...

journal_title：Journal of virology

authors： Thacore HR,Youngner JS

更新日期：1972-03-01 00:00:00

abstract：:Polyamine depletion produced by exogenous arginine in Escherichia coliK-12 cultures defective in agmatine ureohydrolase activity resulted in a marked inhibition of the rates of growth and nucleic acid synthesis. Addition of putrescine or spermidine to such depleted cultures restored the control rate of growth and nucl...

journal_title：Journal of virology

authors： Dion AS,Cohen SS

更新日期：1972-03-01 00:00:00