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photosuppression of mitomycin-induced lambda-phage development. 19684869715
[action of ultraviolet rays on bacteriophage lambda]. 19684174324
the lysozyme of bacteriophage lambda. ii. amino acid and end group analysis. 19694181160
induction and multiplication of lambda-phage. iv. the effect of panfuran. 19694911436
a search for cooperative infection of p1-lysogenic escherichia coli by restricted lambda phage. 19694896156
the mechanism of restriction of bacteriophage lambda in escherichia coli strains: demonstration of an in vivo requirement for s-adenosylmethionine. 19694897045
protection and host cell repair of irradiated lambda phage. i. irradiation of normal phage with ultraviolet light. 19694897977
protection and host cell repair of irradiated lambda phage. ii. irradiation of 5-bromouracil-substituted phage with near visible light. 19694897978
protection and host cell repair of irradiated lambda phage. 3. ultraviolet irradiation of 5-bromouracil-substituted phage. 19694897979
characteristics of some multiply recombination-deficient strains of escherichia coli.strains of escherichia coli have been made carrying lesions in more than one gene determining recombination. the following genotypes were constructed and verified: recc22 recb21 reca(+), recc22 recb21 reca13, recc22 recb(+)reca13, and recc(+)recb21 reca13. all multiple rec(-) strains carrying reca13 were similar to ab2463, which carries reca13 alone, in their uv sensitivities, recombination deficiencies, and inabilities to induce lambda phage in a lysogen. however, whereas ab2463 shows a high ra ...19694898990
chromosome mobilization in rec-merodiploids of escherichia coli k12 following infection with bacteriophage lambda. 19694902068
alteration of rna polymerase during transcription of phage lambda dna "in vivo". 19694902783
recombination in bacteriophage lambda. 3. studies on the nature of the prophage attachment region. 19694904107
the integration and excision defect of bacteriophage lambda-dg. 19694904108
two stages in the replication of bacteriophage lambda dna. 19694904393
induction of phage lambda by transferred irradiated coli dna. 19694905437
leakiness of pleiotropic maltose-negative, bacteriophage lambda-resistant mutants of escherichi coli k-12.cultures of escherichia coli k-12 mala(-)lambda(r)gal(-) can be transduced to gal(+) by bacteriophage lambdadg because of leakiness of the lambda(r) phenotype. the efficiency of such transduction is about 10(-5) that of transduction of mal(+)lambda(s) bacteria. leaky cells (lambda(s)phenocopies) adsorb only very few phage particles, and many transductants, therefore, are defective heterogenotes or show integration of the gal(+) gene, which is unaccompanied by lysogenization.19694905538
effect of u.v.-irradiated dna containing 5-bromouracil on reactivation u.v. damage in phage lambda. 19694905876
antigenic differences between wild type and mutants of bacteriophage lambda. 19694887235
the steric effect in lysogenization by bacteriophage lambda. iv. superinfection of nonimmune lysogens. 19694887934
ring opening of covalent lambda phage dna circles after thermal induction of superinfected lysogens: control by gene n. 19694889432
the lysozyme of bacteriophage lambda. i. purification and molecular weight. 19694889461
the lysozyme of bacteriophage lambda. 3. ordering the cyanogen bromide peptides. 19694889462
loss of host-controlled restriction and modification of phage lambda in escherichia coli k12 previously infected with uv-irradiated coli-phage dt3. 19694891221
new mutations in the s cistron of bacteriophage lambda affecting host cell lysis. 19694891223
strains of phage lambda in current use. 19694891412
the effect of 5-aminoacridine on the vegetative reproduction of bacteriophage lambda. 19694891743
deoxyribonuclease iv: a new exonuclease from mammalian tissues.an exonuclease which specifically degrades double-standard dna has been isolated from rabbit tissues. the enzyme has an approximate molecular weight of 42,000, requires a divalent metal ion as cofactor, and attacks dna at the 5'-terminal ends, thereby liberating 5'-mononucleotides. it degrades several synthetic polydeoxynucleotides of single repeating base sequences more rapidly than dna from natural sources. the specificity of this mammalian enzyme resembles that of several microbial enzymes (p ...19695256235
nonessential functions of bacteriophage lambda. 19694974326
orientation and control of transcription in e. coli phage lambda. 19695765054
mapping of deletions and substitutions in heteroduplex dna molecules of bacteriophage lambda by electron microscopy.electron microscopy of heteroduplex dna molecules, composed of one strand of escherichia coli phage lambda(+) dna annealed to the complementary dna strand of a lambda deletion or substitution mutant, permits visualization, as well as precise measurements and mapping, of the unpaired single-stranded regions of nonhomology in the otherwise double-stranded molecules. in the lambdab2 mutant, the central segment (13 percent) of the lambda(+) dna molecule is shown to be deleted. in the hybrid phages l ...19695765116
genetic mapping of an endonuclease synthesized by bacteriophage lambda. 19695799035
patterns of convergent and overlapping transcription within the b2 region of coliphage lambda. 19695803945
the effect of proflavine on the vegetative reproduction of bacteriophage lambda. 19695804680
lambda phage mutants insensitive to temperature-sensitive repressor. i. isolation and genetic analysis of weak-virulent mutants. 19695804682
membrane association by bacteriophage lambda-dna: possible direct role of regulator gene n. 19695806995
[photosuppression of mitomycin-induced lambda-phage development]. 19695815265
inactivation of bacteriophage lambda containing semiconserved alkylated deoxyribonucleic acid.immediate and delayed inactivation of ethylmethane sulfonate (ems)-treated lambda phage were studied. phage particles with one alkylated and one intact deoxyribonucleic acid (dna) strand were obtained by allowing host-modified, ems-treated phage to undergo one growth cycle in a nonmodifying host and selecting the progeny with semiconserved parental dna on a restricting host. the results indicate that particles with one alkylated dna strand are more sensitive to a second treatment with the alkyla ...19695823226
in vitro polymerization of bacteriophage lambda tails. 19695344290
dna replication in head mutants of bacteriophage lambda. 19695357220
insertion of phage mu. 1 within prophage lambda. a new approach for studying the control of the late functions in bacteriophage lambda. 19695370121
the biosynthesis of phage lambda dna. 19695372867
induction and multiplication of lambda-phage. 3. the effect of hydroxyurea on heat induction. 19695377768
isolation and base composition of sites on lambda phage dna which bind with rna polymerase of escherichia coli. 19694306141
role of host rna polymerase for lambda phage development. 19694390186
nucleotide sequence analysis of dna. i. partial sequence of the cohesive ends of bacteriophage lambda and 186 dna. 19704321727
[genetic recombination and "lex" function in uv reactivation and mutagenesis of phage lambda]. 19704098020
the morphogenesis of bacteriophage lambda. i. purification and characterization of lambda heads and lambda tails. 19704099070
gene expression in bacteriophage lambda. i. the kinetics of the requirement for n gene product. 19705411187
on the function of the n cistron in phage lambda. 19705411191
location of the phage lambda gene responsible for turning off lambda-exonuclease synthesis. 19705411194
lambda phage mutants insensitive to temperature-sensitive repressor. ii. genetic character of lambda vir c mutant. 19705415250
a site essential for expression of all late genes in bacteriophage lambda. 19705418171
suppression of a mutant phenotype concerning head formation of bacteriophage lambda by the product of the lambda repressor gene. 19705424817
functional analysis of early defective mutants of coliphage lambda. 19705432279
on the control of lysogeny in phage lambda. 19705437788
[the mechanism of t2 and lambda phage dna molecule double break formation when irradiated in solution and the radiobiologic role of these breaks]. 19705451502
effect of mutations in the c2 and c3 genes of bacteriophage lambda on macromolecular synthesis in infected cells. 19705453348
mutator gene action and the replication of bacteriophage lambda dna. 19705453351
[lambda-phage; introduction to the special issue on lambda phage]. 19705465674
mutations of coliphage lambda affecting the expression of replicative functions o and p. 19705475574
nucleotide clusters in deoxyribonucleic acids. vi. the pyrimidine oligonucleotides of strands r and l of bacteriophage lambda dna. 19705485908
controls of rightward transcription in coliphage lambda. 19705492022
gene expression in bacteriophage lambda. ii. regulation of rna synthesis in vivo by the n protein. 19705493281
[density gradient ultracentrifugation of absolute defective lambda phage mutants]. 19705503575
[regulation of the transcription of bacteriophage lambda dna infecting a membranous system obtained from e. coli spheroplasts]. 19704938068
isolation of a dna ligase from phage lambda c-1-infected escherichia coli. 19704985537
isolation of a dna-nicking enzyme from phage lambda-ci-infected escherichia coli. 19704992301
the role of exonuclease and beta protein of bacteriophage lambda in genetic recombination. i. effects of red mutants on protein structure. 19704992641
[the irreparability of damage caused by 1m hydroxylamine in lambda phage when submitted to passage in e. coli hcr+ and hcr- cells]. 19704932341
on the transfer of information from old to new chains of dna duplexes in phage lambda: destruction of heterozygotes.the watson-crick model for dna duplex duplication proposes that the two parental chains separate and that each directs the synthesis of a complementary chain with which it is found associated after the duplication act. previous experiments have left unchallenged alternative models which propose that in any single act of duplication only one of the two parental chains provides information for the synthesis of both new chains. the models are operationally ditinguishable since the former demands th ...19705263770
regulation of repressor expression in lambda.a new gene in bacteriophage lambda is described. the product of this gene cro prevents expression of immunity and regulates the expression of those genes to the left of the immunity region. cro(-) mutants have been isolated and characterized.19705269249
control of transcription of the repressor gene in bacteriophage lambda.the rate of transcription of the structural gene for repressor (ci gene) in bacteriophage lambda is controlled by the amount of active repressor in the cell. when the (reversibly) thermolabile repressor in a bacterium lysogenic for lambdaci(857) is inactivated by heat, the rate of repressor gene transcription immediately falls. if the repressor is renatured, synthesis of repressor messenger is immediately restored to a high rate. control by the repressor of the rate of transcription of its own s ...19705274442
mutation and recombination of bacteriophage lambda: effect of ultraviolet radiation.defects in the bacterial recb or recc or phage red or int gene did not impair ultraviolet light-induced clear mutations of lambda phage. clear mutants of ci and cii genes were not enriched among reca-promoted uv-induced recombinants between the n and o genes which closely encompass the c genes. no correlation was observed between uv-induced mutation and genetic recombination.19705276152
repression of induction by u.v. of lambda phage by exra mutations in escherichia coli. 19704905952
new mutants of bacteriophage lambda with a specific defect in excision from the host chromosome. 19704907272
integrative and excisive recombination by bacteriophage lambda: evidence for an excision-specific recombination protein. 19704907273
complementation experiments about the q gene of phage lambda. 19704907409
behavior of coliphage lambda in hybrids between escherichia coli and salmonella.salmonella typhosa hybrids able to adsorb lambda were obtained by mating s. typhosa recipients with escherichia coli k-12 donors. after adsorption of wild-type lambda to these s. typhosa hybrids, no plaques or infective centers could be detected. e. coli k-12 gal(+) genes carried by the defective phage lambdadg were transduced to s. typhosa hybrids with hft lysates derived from e. coli heterogenotes. the lysogenic state which resulted in the s. typhosa hybrids after gal(+) transduction differed ...19704908675
regulation of bacteriophage lambda development by gene n: properties of a mutation that bypasses n control of late protein synthesis. 19704909409
deletion mapping of the c3-c2 region of bacteriophage lambda. 19704910435
replication of bacteriophage lambda dna associated with the host cell membrane. 19704910439
properties of phage lambda dna-rna polymerase complexes isolated from escherichia coli (lambda). 19704912207
specialized transduction of galactose by lambda phage from a deletion lysogen. 19704912822
bacteriophage lambda; abortive infection of bacteria lysogenic for phage p2.the efficiency of plating of wild-type lambda on a host lysogenic for p2 is less than 10(-6), and only a small number of infected cells produce progeny phage. lambda can adsorb and inject its dna normally in such cells; the dna can circularize and is not nicked or degraded, but replication is severely impaired. mutants of p2, which as prophages no longer interfere with lambda, have been isolated and found to be recessive to wild type, implying that p2 prophage codes for a diffusible product invo ...19704913204
genetic expression in bacteriophage lambda. 3. inhibition of escherichia coli nucleic acid and protein synthesis during lambda development. 19704916548
light-induced cross-linking of dna in the presence of a furocoumarin (psoralen). studies with phage lambda, escherichia coli, and mouse leukemia cells. 19704927248
crypticogenicity of bacteriophage lambda. 19704920426
effect of carbohydrates on induction of bacteriophage lambda. 19704920472
intracellular pools of bacteriophage lambda deoxyribonucleic acid. 19704920498
correlations between host-cell reactivation, ultraviolet reactivation and pyrimidine dimer excision in the dna of bacteriophage lambda. 19704921248
lambda phage transduction of the bio a locus of escherichia coli. 19704921685
reduced immunity in lysogens of bacteriophage lambda due to a mutation in the prophage. 19704921686
unbiased synthesis of pulse-labeled dna framents of bacteriophage lambda and t4. 19704922215
[repression system of bacteriophage lambda and control of gene function]. 19704922246
the morphogenesis of bacteriophage lambda. ii. identification of the principal structural proteins. 19704923012
morphological proteins of phage lambda: identification of the major head protein as the product of gene e. 19704923016
ultraviolet reactivation in bacteriophage lambda. 19704923498
properties of recombination-deficient mutants of bacteriophage lambda. 19704923748
mutants of escherichia coli with altered surface properties which are refractory to colicin e2, sensitive to ultraviolet light and which can also show recombination deficiency, abortive growth of bacteriophage lambda and filament formation. 19704924623
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