Results 211 to 220 of about 9,158 (245)

The biosynthesis of proline by Tetrahymena pyriformis

Biochimica et Biophysica Acta (BBA) - General Subjects, 1967
Abstract 1. 1. This report concerns the pathway for proline formation in Tetrahymena pyriformis and the biochemical basis for the sparing effects of citrulline, ornithine, and proline on the arginine requirement of this organism. Proline is formed from arginine through the intermediates citrulline, ornithine, and glutamate γ-semialdehyde (Δ1 ...
Donald L. Hill, Patti Chambers
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Phosphatidylcholine biosynthesis in Tetrahymena pyriformis

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1970
Abstract 1. 1. Phosphatidylcholine biosynthesis in Tetrahymena pyriformis was investigated. Experiments in vivo using [Me-14C]methionine showed incorporation of radioactivity into the choline portion of phosphatidylcholine. No methylation of 2-aminoethylphosphonic acid was detected.
Joseph Donald Smith, John H. Law
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Cadmium-thionein in Tetrahymena thermophila and Tetrahymena pyriformis

European Journal of Protistology, 1990
The treatment of Tetrahymena thermophila with cadmium causes a reduction in growth rate according to dose; almost all the metal is accumulated in the cytosol where the Zn content is also increased threefold. Bio-Gel and Water 160 (HPLC) column chromatography show that Cd and Zn are bound to a protein with an ultraviolet (UV) spectrum that appears to be
PICCINNI, ESTER, IRATO, PAOLA, GUIDOLIN, LAURA   +2 more
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The transformation of testosterone by Tetrahymena pyriformis

Journal of Steroid Biochemistry, 1976
Abstract [4- 14 C]-Testosterone was completely transformed into multiple 14 C-products when incubated with cultures of Tetrahymena pyriformis , strains W and II-1. One of the principal 14 C-products was identified to be 4-androstene-3β,17β-diol.
David F. Johnson, Nancy S. Lamontagne, Chester E. Holmlund   +2 more
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Formation of ribosomes in Tetrahymena pyriformis

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1968
Abstract The formation of ribosomal sub-units—derived from ribosomes by dialysis against low Mg 2+ concentration—has been studied by incorporation of RNA precursors into exponentially growing Tetrahymena cells. The 50-S derived sub-units show a delayed kinetics of labeling as compared to the 30-S derived subunits.
Vagn Leick, Paul Plesner
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The characterization of the cilia of Tetrahymena pyriformis

Experimental Cell Research, 1959
Abstract Two methods are described for isolating cilia from Tetrahymena pyriformis W. The isolate appears to consist of the axial fibrils of the cilia. Cilia isolated by the alcohol-KCl method are dissolved by alkaline thioglycolate; cilia isolated by the glycerol method are dissolved by alkali (pH 11) alone.
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Search for a phosphagen in Tetrahymena pyriformis

Comparative Biochemistry and Physiology, 1965
Abstract 1. 1. The question whether the protozoan Tetrahymena pyriformis possesses a phosphagen was investigated. An approach to the problem was made by characterization of the guanidine compounds of this organism and by hydrolysis studies of the phosphate-containing compounds. 2. 2. The predominant guanidine present was arginine.
J. Van Eys, D.L Hill, J. Judd
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Effects of Iproniazid on Tetrahymena pyriformis

Journal of Pharmaceutical Sciences, 1961
Abstract The effect of iproniazid on the rate of increase of cell mass and on the respiration of the cells and homogenates of Tetrahymena pyriformis has been studied for the purpose of obtaining information concerning the biological action of this drug. A number of different substrates were employed in the respiration studies.
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Characterization of ribosomes of Tetrahymena pyriformis

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1968
Abstract Some of the properties of the 80-S ribosome of Tetrahymena pyriformis have been examined. We estimate from sedimentation coefficient (79.5-S) and intrinsic viscosity (0.074 dl/g) a mol. wt. of 4.6·10 6 for the ribonucleoprotein particles. The RNA and protein ratio of the ribosomes is close to one.
D.B. Johnstone, A. Raina, David L. Weller   +2 more
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The transsulfuration pathway in tetrahymena pyriformis

Biochimica et Biophysica Acta (BBA) - General Subjects, 1977
Four enzymes necessary for the metabolism of methionine by the trans-sulfuration pathway, methionine adenosyltransferase (EC 2.5.1.6), adenosylhomocysteinase (EC 3.3.1.1), cystathionine beta-synthase (EC 4.2.1.22) and cystathionine gamma-lyase (EC 4.4.1.1) were identified in Tetrahymean pyriformis.
David E. Cook, An Q. Dang
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