Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The basis for the difference between strains 168 (d-tyrosine-sensitive) and 23 (d-tyrosine-resistant) of Bacillus subtilis at the molecular level is that of transport of d-tyrosine into the cell. Strain 23 does not incorporate significant amounts of d-tyrosine into whole cells. A mutant derivative was isolated from strain 23 which had an altered transport system permitting d-tyrosine uptake, a change which also led to inhibition of growth by d-tyrosine. Strain 168 is extremely sensitive to growth inhibition caused by low concentrations of the d-isomer of tyrosine. A mutant derivative of strain 168 selected for its d-tyrosine resistant phenotype had an altered transport system which no longer recognized the d-isomer of tyrosine. These mutants define at least one element of the tyrosine transport system in B. subtilis and provide a convenient phenotype for the eventual location of the chromosal map position.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 247 (1974), S. 290-292 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Comparing the regulation of aromatic amino acid synthesis in AgmeneUum quadruplicatum3 and Anacystis nidulans (Kratz-Myers strain), we found that most of the key enzymes were stable. Anthranilate synthetase, 3-deoxy-D-arabino-heptulosonate 7-phosphate (DAHP) synthetase, prephenate dehydratase, ...
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-1432
    Keywords: Pretyrosine ; Metabolic Pathways ; Blue-Green Algae ; Transamination ; Prokaryotes ; L-Tyrosine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The 4-hydroxyphenylpyruvate pathway of L-tyrosine biosynthesis is well known. The presence of a second pathway appears to be a group characteristic of the blue-green algae (bacteria) which accordingly synthesize L-tyrosine by transamination of prephenate followed by a dehydrogenation reaction. An amino acid metabolite, pretyrosine, is the novel biochemical intermediate of the new pathway (denoted the pretyrosine pathway). All species of blue-green bacteria tested possessed only the pretyrosine pathway, while a variety of non-photosynthetic taxa exhibited only the 4-hydroxyphenylpyruvate pathway. A cell type that may reflect some properties of an ancient evolutionary intermediate is the pseudomonad group, a possibility suggested by the ability ofPseudomonas aeruginosa extracts to carry out both sets of pathway reactions.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...