منابع مشابه
In vitro assembly of bacteriophage Lambda heads.
The assembly of plaque-forming particles in cell-free extracts of induced lambda lysogens was observed two ways. (i) DNA isolated from a lambda-related phage, 434 for example, is added to an extract of an induced lambda lysogen, and plaque-formers with the genotype of the added DNA are detected. (ii) One extract from an induced lambda lysogen that carries an amber mutation in one of the head ge...
متن کاملAssembly of biologically active proheads of bacteriophage lambda in vitro.
Bacteriophage lambda DNA can be packaged in vitro into preformed proheads to generate plaque-forming units. This complex set of reactions is initiated when lambda DNA is mixed with the product of the phage A gene, and proheads. Because proheads are an essential early reactant, the system has potential as an assay for the formation of biologically active proheads. When extracts of cells infected...
متن کاملStability puzzles in phage lambda.
In the absence of RecA-mediated cleavage of the repressor, the lambda prophage is exceptionally stable. We develop a stochastic model that predicts the stability of such epigenetic states from affinities of the molecular components. We find that the stability, in particular, depends on the maximum possible cI protein production, and on the number of translated cro proteins per transcribed mRNA....
متن کاملRegulation by N gene protein of phage lambda of anthranilate synthetase synthesis in vitro.
The N protein of bacteriophage lambda is a positive regulator of early lambda gene expression. In a lambdatrp transducing phage, lambdatrp46Nam, the synthesis of trp enzymes in vivo is also dependent on the presence of active N protein. The DNA of this phage has been used in a protein-synthesizing system in vitro to develop a biochemical assay for the activity of the N protein. From the followi...
متن کاملStability and instability in the lysogenic state of phage lambda.
Complex gene regulatory circuits exhibit emergent properties that are difficult to predict from the behavior of the components. One such property is the stability of regulatory states. Here we analyze the stability of the lysogenic state of phage λ. In this state, the virus maintains a stable association with the host, and the lytic functions of the virus are repressed by the viral CI repressor...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1966
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.55.6.1462