The Tryptophan Operon
THE TRYPTOPHAN OPERON OF SALMONELLA TYPHIMURIUM. FINE STRUCTURE ANALYSIS BY DELETION MAPPING AND ABORTIVE TRANSDUCTION
... Mapping the tryptophan operon: The map presented in Figure 2 has been constructed from (1) crosses between multisite and single site mutants, (2) crosses between mu[r] ...
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REGULATORY MUTANTS OF THE TRYPTOPHAN OPERON OF SALMONELLA TYPHIMURIUM
... Mutants of this class had several distinctive charac- teristics in common: (a) they were isolated only in strains carrying extremely polar trpA mutations (Table 5 ) ; (b) t[r] ...
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A Qualitative Biochemistry and Its Application to the Regulation of the Tryptophan Operon
... trp operon simula- tions are slower by roughly a factor of 20 than are simulations in which ob- jects are modified ...trp operon because some processes within this system generate many complex ...
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TRANSLATIONAL COUPLING DURING EXPRESSION OF THE TRYPTOPHAN OPERON OF ESCHERICHIA COLI
... OCADA and TSUGITA 1970) and polarity suppressors (A. Therefore, the kind of analysis presented in this study requires the presence of a gene downstream from the pair of genes b[r] ...
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TRYPTOPHANYL TRANSFER RNA SYNTHETASE AND EXPRESSION OF THE TRYPTOPHAN OPERON IN THE trpS MUTANTS OF ESCHERICHIA COLI
... However, when a repressed culture of the trpS5 mutant was transferred to a tryptophan-limited medium, derepression for the tryptophan biosynthetic enzymes as well as for [r] ...
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POLARITY AND ENZYME FUNCTIONS IN MUTANTS OF THE FIRST THREE GENES OF THE TRYPTOPHAN OPERON OF ESCHERICHIA COLI
... Examination of strong polar mutants for antipolarity: Antipolarity, the reduc- tion of the relative level of the polypeptide specified by the gene of an operon immediately p[r] ...
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EVIDENCE FOR THE SEPARABILITY OF THE OPERATOR FROM THE FIRST STRUCTURAL GENE IN THE TRYPTOPHAN OPERON OF SALMONELLA TYPHIMURIUM
... Derivation of the double mutant trp0517 trpA111 and its revertants: Figure 1 is a map of the tryptophan (trp) operon of Salmonella typhimurium showing the order of the five [r] ...
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Dynamic diversity of the tryptophan pathway in chlamydiae: reductive evolution and a novel operon for tryptophan recapture
... The tryptophan repressor The presence of trpR implies that the tryptophan operon is under repression control by L -tryptophan, and some experi- mental evidence does indeed show derepression ...
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Clinical Persistence of Chlamydia trachomatis Sexually Transmitted Strains Involves Novel Mutations in the Functional αββα Tetramer of the Tryptophan Synthase Operon
... catabolizes tryptophan, an essential amino acid for Ct ...synthesizing tryptophan from indole, a substrate for the enzyme tryptophan ...an operon comprised of ␣ and  subunits that encode TrpA ...
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One-step of tryptophan attenuator inactivation and promoter swapping to improve the production of L-tryptophan in Escherichia coli
... the tryptophan attenuator inactivation and promoter replacement, the transcription of five tryptophan operon genes in the strains GPT1002 and GPT1001 was compared employing RT-PCR (Figure ...five ...
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The tryptophan pathway genes of the Sargasso Sea metagenome: new operon structures and the prevalence of non operon organization
... Among the trp genes organized into operon structures, most resemble examples already discovered. In addition, two pre- viously unknown groupings were uncovered in the present search. However a notable quantity of ...
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Brand Names: Canada APO-Tryptophan; DOM-Tryptophan; PMS-Tryptophan; TEVA- Tryptophan; Tryptan
... If you have any questions about this drug, please talk with your doctor, nurse, pharmacist, or other health care provider.. Some drugs may have another patient information leaflet.[r] ...
THE GALACTOSE OPERON OF E. COLI K-12. I. STRUCTURAL AND PLEIOTROPIC MUTATIONS OF THE OPERON
... They were then assayed for transduction of strains carrying both a n amber or ochre suppressor and the large S165 deletion which removes the entire epimerase and transferase [r] ...
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The Bacillus subtilis sin Operon
... same operon, but controlling their activities differentially, can lead to diverse regulatory ...sin operon from the Bacillus subtilis sporulation pathway as a model system, we built a theoretical model, ...
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EVOLUTION OF A REGULATED OPERON IN THE LABORATORY
... When ebgA carries mutations in both the Class I and the Class I1 sites simul- taneously the resulting double mutant enzyme, designated Class IV, acquires a new function: it [r] ...
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Gene Regulation -- The Lac Operon
... b) Mutants in the promoter that change the base sequence so that it is no longer recognized by the repressor protein are also constitutive for Z, Y and A expression. In this case however, the mutation is dominant in ...
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Tryptophan Metabolism in Man
... in a patient with tryptophan malabsorption and hypercalcemia (20, 21). In this disease a much greater excretion in kynurenine-pathway metabo- lites is seen after intravenous loading than[r] ...
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THE GALACTOSE OPERON OF E. COLI K-12. II. A DELETION ANALYSIS OF OPERON STRUCTURE AND POLARITY
... From these results, we conclude that the galactose operon is a negatively controlled, polarized unit of transcription and translation governed by essential and rate-limiting genetic[r] ...
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Gene of the Histidine Operon in Salmonella typhimurium
... (18) that reactions of identity occur among the fol- lowing isomerase preparations: (i) purified isomerase from derepressed hisEll; (ii) crude extracts of his- tidine auxotrophs mapping [r] ...
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Redetermination of L tryptophan hydrobromide
... The crystal structures of amino acids and their complexes have provided interesting information about aggregation, and the effect of other molecules on their interaction and molecular properties (Vijayan, 1988; Prasad & ...
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