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A study of mitochondrial membranes in relation to elementary particles.
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Modifications, some cytochemical properties and transport of intralysosomal membranes.
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Stages in phage R17 infection. V. Phage eclipse and the role of F pili.
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[Comparative studies on reductometric and enzymic methods for the determination of uric acid (author's transl)].
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Disruption of Bordetella pertussis in the Ribi cell fractionator. 2. Effect of different suspending media.
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In vitro oxidation of uric acid in serum by methylene blue.
Methylene blue oxidizes uric acid to allantoin in vitro, analogous to the reaction between uric acid and phosphotungstate, although the rate is considerably slower. The reaction requires oxygen and produces hydrogen peroxide. As little as 10 micromol of methylene blue per liter in a serum sample will produce a measurable difference in the apparent uric acid concentration within 4 h at room temperature. Methylene blue may be administered for various medical reasons. If uric acid is to be measured in such sera, the procedure should be performed within 30 min, whatever method of analysis is used.
Effect of growth medium on the division of a filament-forming mutant of Salmonella typhimurium.
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The morphogenesis of bacteriophage lambda. I. Purification and characterization of lambda heads and lambda tails.
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Isolation and protein composition of normal and petit capsids of bacteriophage lambda.
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Peptide-amphiphile nanofibers: a versatile scaffold for the preparation of self-assembling materials.
Twelve derivatives of peptide-amphiphile molecules, designed to self-assemble into nanofibers, are described. The scope of amino acid selection and alkyl tail modification in the peptide-amphiphile molecules are investigated, yielding nanofibers varying in morphology, surface chemistry, and potential bioactivity. The results demonstrate the chemically versatile nature of this supramolecular system and its high potential for manufacturing nanomaterials. In addition, three different modes of self-assembly resulting in nanofibers are described, including pH control, divalent ion induction, and concentration.
Ultrastructural studies with influenza viruses. I. Effect of some reagents on the fine structure of the virion.
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Formation of platelet-fibrin thrombi by ellagic acid and adenosine diphosphate in the rat.
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Presence of bacteriophage-like inhibitory particles in Escherichia coli.
Bacteriophage-like particles were found in the supernatant fluids of Escherichia coli O111a and O111:B(4). Caution is urged in the study of deoxyribonucleic acid synthesis and replication in these strains.
Application of Fe(II)-5-pyridyl benzodiazepin-2-ones to the manual or automated determination of serum uric acid.
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Capsid and procapsid proteins of a bovine enterovirus.
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Studies on the developmental cycle of Chlamydia trachomatis: isolation and characterization of the initial bodies.
The initial bodies which develop in the inclusion bodies of trachoma agent (Chlamydia trachomatis) were separated from the infected cells nuclei and cytoplasmic components by zone centrifugation in sucrose gradients. The initial bodies are the site of the agent's ribonucleic acid synthesis and serve as precursors to the elementary bodies. The conversion of the initial bodies to elementary bodies is through a process which resembles binary fission. The effects of antibiotics on the development of the trachoma agent initial bodies revealed that rifampin prevented and hydroxyurea affected the formation of the initial bodies. Penicillin led to the formation of structures larger than the initial bodies.
Proteins of vesicular stomatitis virus and of phenotypically mixed vesicular stomatitis virus-simian virus 5 virions.
The identity of the glycoprotein of vesicular stomatitis virus (VSV) as the spike protein has been confirmed by the removal of the spikes with a protease from Streptomyces griseus, leaving bullet-shaped particles bounded by a smooth membrane. This treatment removes the glycoprotein but does not affect the other virion proteins, apparently because they are protected from the enzyme by the lipids in the viral membrane. The proteins of phenotypically mixed, bullet-shaped virions produced by cells mixedly infected with VSV and the parainfluenza virus simian virus 5 (SV5) have been analyzed by polyacrylamide gel electrophoresis. These virions contain all the VSV proteins plus the two SV5 spike proteins, both of which are glycoproteins. The finding of the SV5 spike glycoproteins on virions with the typical morphology of VSV indicates that there is not a stringent requirement that only the VSV glycoprotein can be used to form the bullet-shaped virion. On the other hand, the SV5 nucleocapsid protein and the major non-spike protein of the SV5 envelope were not detected in the phenotypically mixed virions, and this suggests that a specific interaction between the VSV nucleocapsid and regions of the cell membrane which contain the nonglycosylated VSV envelope protein is necessary for assembly of the bullet-shaped virion.