Results 161 to 170 of about 5,083 (214)

Antimutagenicity in Euglena gracilis

Mutation Research Letters, 1994
The genotoxic effect of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) and furadantine (Fu) was significantly decreased by standard antimutagens (ascorbic acid, alpha-tocopherol, chlorophyllin and sodium selenite) in the unicellular flagellate Euglena gracilis. The effects of these compounds were verified also by a bacterial test in which three strains of
P, Foltínová, N, Lahitová, L, Ebringer   +2 more
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Thiamin uptake in Euglena gracilis

Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, 1987
Thiamin uptake has been investigated in Euglena gracilis Z. This protozoon possessed an active transport system for thiamin with a Km value of 17 nM and a Vmax value of 7.8 pmol per 10(6) cells per min. Thiamin uptake was dependent on pH and temperature, but not on exogenous glucose as an energy source.
S, Shigeoka, T, Onishi, K, Maeda, Y, Nakano, S, Kitaoka   +4 more
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Degradation of Paramylon by Euglena gracilis

The Journal of Protozoology, 1968
SYNOPSIS. Protozoa of the order Euglenida contain a polysaccharide storage product, paramylon, composed of 1, 3‐linked glucose molecules arranged into an extremely resistant granule. An enzyme was purified from the soluble phase of Euglena gracilis which would degrade this polysaccharide to single glucose residues, providing the integrity of the ...
K, Vogel, A A, Barber
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A Euglena gracilis zinc endonuclease

Biochemistry, 1993
A 26-kDa endonuclease has been purified to homogeneity from zinc-sufficient Euglena gracilis. The protein binds to single-stranded DNA with a higher affinity than to double-stranded DNA, but it exhibits nucleolytic activity toward both. Thus, it converts supercoiled plasmid pBR322 DNA into the linear form, a property characteristic of endonucleases ...
M, Czupryn, K H, Falchuk, A, Stankiewicz, B L, Vallee   +3 more
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Ferredoxin biosynthesis in Euglena gracilis

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1976
Analysis of ferredoxin content in cultures of Euglena gracilis grown in the presence of selective antibiotic inhibitors of protein synthesis resulted in the following conclusions: 1. Ferredoxin is synthesized from cytoplasmic (80s-type) ribosomes; cycloheximide, a potent inhibitor of 80s translation completely abolished the synthesis, while the ...
R S, Matson, T, Kimura
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Ribonuclease of Euglena gracilis

Science, 1960
An enzyme in extracts of Euglena gracilis splits both purine and pyrimidine internucleotide bonds of ribonucleic acid. Its p H optimum is at 4.5; it is very heat-labile and is rather insensitive to inhibition by metal ions or sulfhydryl group reagents.
J, FELLIG, C E, WILEY
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Mitomycins and the bleaching of Euglena gracilis

Archiv für Mikrobiologie, 1969
The effects of some mitomycin antibiotics on the chloroplast system of Euglena gracilis were studied. Only those derivatives which contained an alkyl group on the aziridine nitrogen were effective bleaching agents. Thus, only N-methyl-mitomycin, porfiromycin, and mitomycin B caused a highly significant loss of chloroplasts.
L, Ebringer, J L, Mego, A, Jurásek
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Heteroxanthin in Euglena gracilis

Archiv f�r Mikrobiologie, 1973
1. From a large scale preparation of Euglena gracilis, strain Z, besides the acetylenic pigments diatoxanthin and diadinoxanthin and the allene neoxanthin, an additional acetylenic xanthophyll has been isolated. 2. Mass and IR spectra and chemical reactions showed typical patterns of heteroxanthin from Vaucheria. 3.
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Gravitaxis and graviperception in euglena gracilis

Advances in Space Research, 1998
Gravitactic orientation in the flagellate Euglena gracilis is mediated by an active physiological receptor rather than a passive alignment of the cells. During a recent space flight on the American shuttle Columbia the cells were subjected to different accelerations between 0 and 1.5 x g and tracked by computerized real-time image analysis.
D P, Hader, M, Lebert, P, Richter
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Euglena gracilis cytochrome 558

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1972
Abstract Euglena gracilis contains both the classical cytochrome f (cytochrome c 552 ) found in algae and plants, and an atypical cytochrome 558, which has covalently bound heme. We report here some of the chemical and physical properties of cytochrome 558, including amino acid composition, molecular size, and spectral properties.
T E, Meyer, M A, Cusanovich
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