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1,094 Result(s)
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Article
Verhandlungen Ärztlicher Gesellschaften
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Bestimmung der Trypsin- und Chymotrypsinaktivität im Stuhl. Eine sensible, spezifische Methode zum Nachweis der exokrinen Pankreasinsuffizienz
Der diagnostische Wert der Chymotrypsin-und Trypsinbestimmung im Stuhl (nachHaverback et al.) als neue Methode zur Erfassung der exokrinen Pankreasinsuffizienz wurde überprüft. Zur Objektivierung der exokrinen Pa...
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Elektronenmikroskopische Untersuchungen über das im Marklager lokalisierte Hirnödem
Das perifokale, durch intracerebrale Koagulationsnekrose beim Kanichen erzeugte Großhirnmarködem, ferner menschliches Marködemgewebe aus der Umgebung operierter Hirntumoren oder herdförmiger Hirnprozesse wurde...
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Dominance and non-complementation among pink-adenineless mutants of Schizophyllum commune involving two discrete genes
In Schizophyllum commune, adenineless mutations conferring pink color fell into two loosely linked loci, ad-4 and ad-7. The mutations were tested for dominance and complementation in dikaryons, and several of the...
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Bacillus Cereus Outgrowth “Early Proteins” and Their Possible Role in Control of Transcription
When dormant spores of Bacillus cereus are heat activated and then exposed to germination inducers, transcription is initiated and is followed by the synthesis of a small number of protein species (1). If, in add...
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Heptose-deficient mutants ofEscherichia coli K12 deficient in up to three major outer membrane proteins
Mutants ofEscherichia coli K12, deficient in up to three major outer membrane proteinsb,c andd have been constructed. Mutants that lack the lipopolysaccharide sugar heptose are deficient in proteinb. All heptose-...
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Conjugation deficient E. coli K12 F- mutants with heptose-less lipopolysaccharide
Two F- mutants deficient in conjugation with F-type donors are isolated and characterized. Phenotypically, these mutants are similar; they have heptose-less lipopolysaccharide and lack some outer membrane protein...
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Influence of cultural conditions and mutations on the composition of the outer membrane proteins ofEscherichia coli
VariousEscherichia coli strains differ in the composition of their major outer membrane proteins. However, allE. coli K12 strains tested possess the same major outer membrane proteinsa, b, c andd although quantit...
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In vitro transcription of three different ribosomal RNA cistrons of E. coli; heterogeneity of control regions
Ribosomal RNA synthesis from three different rRNA cistrons of E. coli, located on different phage DNAs was compared and found to have the same characteristics as regards chain length, salt and temperature depende...
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Genetic map** of the lexC-113 mutation
A mutation, previously designated lex-113 and suspected to be situated in the lexA locus, has been positioned by transductional studies to a unique site on the chromosome of E. coli B separate from the lexA102 an...
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Pores in the outer membrane of Escherichia coli K12
Mutants lacking outer membrane proteins were studied in order to investigate the role of these proteins in the functioning of aqueous pores through the outer membrane. Protein b is involved in the functioning ...
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23. Continuous fetal pH monitoring
Die bisher mit der neuen subcutanen pH-Elektrode erzielten Ergebnisse bestätigen die Zuverlässigkeit dieser Methode, was die rein technischen Aspekte betrifft.
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Genetics and biochemistry of the peptidoglycan-associated proteins b and c of Escherichia coli K12
To collect information on synthesis and regulation of the peptidoglycan-associated pore-forming outer membrane proteins b and c, mutants resistant to phages Mel and TuIa were analyzed. Genetic analysis showed ...
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meoA is the structural gene for outer membrane protein c of Escherichia coli K12
The isolation and characterization of two mutants of Escherichia coli K12 with an altered outer membrane protein c is described. The first mutant, strain CE1151, was isolated as a bacteriophage Mel resistant stra...
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Specific stimulation of ribosomal RNA synthesis in E. coli by a protein factor
Ribosomal RNA synthesis in a purified system is stimulated by a crude protein fraction prepared from E. coli. The positive effector which is not associated with RNA polymerase, nor is the sigma factor, increases ...
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Antigen-binding receptors on T cells from long-term MLR. Evidence of binding sites for allogeneic and self-MHC products
Antibody inhibition of radiolabelled stimulator membrane vesicle binding by T blasts activated in the mixed lymphocyte reaction (MLR) was used to identify responder-cell determinants involved in the binding ph...
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Organization and Replication of Pseudorabies Virus DNA
The genome of Pr virus, swine herpesvirus, consists of a linear, double-stranded DNA molecule, molecular weight approximately 90 × 106 (5, 21). Pr viral DNA has a relatively high G+C content (73 moles %) (2) and ...
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A mutation in the RNA polymerase β′ subunit causing depressed ribosomal RNA synthesis in Escherichia coli
Macromolecular synthesis in an Escherichia coli mutant with a temperature-sensitive β′ subunit of RNA polymerase was analysed. At the non-permissive temperature ribosomal RNA synthesis is strongly reduced while m...
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Cloning of ompF, the structural gene for an outer membrane pore protein of E. coli K12: Physical localization and homology with the phoE gene
The ompF gene of Escherichia coli K12, which is the structural gene for an outer membrane pore protein has been cloned into the multicopy plasmid vector pACYC184. Expression of the cloned ompF gene results in ove...
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Phenotypic expression in vivo and transforming activity in vitro: Two related functions of folded bacterial chromosomes
Nucleoids prepared by gentle lysis of non-complementing diploid cells resulting from Bacillus subtilis protoplast fusion have been used to transform competent cultures of appropriate recipient strains. The yields...