Results 261 to 270 of about 10,441,214 (290)
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Photodynamic Effects of Pterin on HeLa Cells
Photochemistry and Photobiology, 2011AbstractPterins, heterocyclic compounds widespread in biological systems, participate in relevant biological processes and are able to act as photosensitizers. In the present study, we ascertained that 2‐aminopteridin‐4(3H)‐one, abbreviated as Ptr, is readily incorporated into and/or onto cervical cancer cells (HeLa) and that these cells die upon UV‐A ...
Denofrio, M. Paula +6 more
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Occurrence of the Crabtree effect in HeLa cells
Cell Biochemistry and Function, 1998The occurrence of a Crabtree effect in HeLa cells was detected. Some properties of pyruvate kinase (PK) were also evaluated. Hexose phosphate, triose-phosphate and phosphoenolpyruvate (PEP) significantly decreased the oxygen consumption of digitonin-permeabilized HeLa cells, which were oxidizing succinate.
Fabiola R. Stevan +4 more
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Regulation of metallothionein production in HeLa cells
Toxicology Letters, 1991Metallothioneins are cysteine-rich, heavy-metal-binding proteins which have been assumed to participate in the detoxification of toxic metals. The mechanism of thionein (apoprotein of metallothionein) induction by cadmium was studied using cultured human cells.
Sone Toshio, Koizumi Shinji
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Henrietta Lacks, HeLa cells, and cell culture contamination.
Archives of Pathology & Laboratory Medicine, 2009Henrietta Lacks died in 1951 of an aggressive adenocarcinoma of the cervix. A tissue biopsy obtained for diagnostic evaluation yielded additional tissue for Dr George O. Gey's tissue culture laboratory at Johns Hopkins (Baltimore, Maryland).
B. Lucey, W. Nelson-Rees, G. Hutchins
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The assembly of ribosomes in HeLa cells
Journal of Molecular Biology, 1966The assembly of proteins and RNA into a mature ribosome has been studied in the HeLa cell by examining the appearance of labeled ribosomal proteins on mature ribosomes after a pulse of radioactive amino acids followed by a chase with cold amino acids. The ribosomal proteins continue to appear as part of cytoplasmic ribosomes for a period of two hours ...
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Methylation of ribosomal proteins in HeLa cells
Archives of Biochemistry and Biophysics, 1976Abstract Methylated amino acids from both 40 and 60S subunit proteins of HeLa cytoplasmic ribosome were analyzed. It was observed that methylation of ribosomal proteins occurs in both subunits with N G , N G -dimethylarginine as the major methylated amino acid.
F.N. Chang +3 more
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Mycoplasma fermentans—HeLa Cell Interactions
Clinical Infectious Diseases, 1993A survey of previous evidence for the intracellular localization of mycoplasmas within nonphagocytic cells indicated that it was insufficient to conclude unequivocally that such localization occurred. Illustrations of the seemingly intracellular existence of Mycoplasma fermentans in the tissues of patients with AIDS and other patients rekindled ...
P. M. Furr +2 more
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Biochimica et Biophysica Acta (BBA) - Specialized Section on Nucleic Acids and Related Subjects, 1964
Abstract An electron-microscope study of the HeLa-cell cytoplasmic and nuclear 74-S ribosomes has been performed. These behave similarly when cations are removed by versene: both break up into 30-S and 50-S subunits. In the heavy part of the centrifugation gradient used to isolate the ribosomes it has been shown that 74-S ribosomes are associated in ...
Winckelmans, Danièle +2 more
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Abstract An electron-microscope study of the HeLa-cell cytoplasmic and nuclear 74-S ribosomes has been performed. These behave similarly when cations are removed by versene: both break up into 30-S and 50-S subunits. In the heavy part of the centrifugation gradient used to isolate the ribosomes it has been shown that 74-S ribosomes are associated in ...
Winckelmans, Danièle +2 more
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Uptake mechanism of oppositely charged fluorescent nanoparticles in HeLa cells.
Macromolecular Bioscience, 2008The endocytotic mechanisms involved in the uptake of charged polystyrene nanoparticles into HeLa cells were investigated. Uptake experiments were done in the presence or absence of drugs known to inhibit various factors in endocytosis. Independent of the
Julia Dausend +6 more
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Purification and reconstitution of HeLa cell microtubules
Biochemistry, 1980Microtubules from suspension cultures of HeLa cells have been purified by carrying them through four complete cycles of polymerization at 37 degrees C and depolymerization at 4 degrees C. These microtubules show, in addition to the major alpha- and beta-tubulin components, major proteins with molecular weights of 201 000-206 000 (comprising 4.5% of the
Robert R. Weihing +2 more
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