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Further mutagenicity studies on pesticides in bacterial reversion assay systems.
A total of 228 pesticides (88 insecticides, 60 fungicides, 62 herbicides, 12 plant-growth regulators, 3 metabolites and 3 other compounds) was tested for mutagenicity in bacterial reversion-assayExpand
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Heterogeneity and Differential Expression under Hypoxia of Two-domain Hemoglobin Chains in the Water Flea, Daphnia magna *
Hemoglobin (Hb) purified from the water flea, Daphnia magna, reared under hypoxia was analyzed by two-dimensional gel electrophoresis. The Hb was shown to be composed of six major subunit chainExpand
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The leuO gene product has a latent ability to relieve bgl silencing in Escherichia coli.
The Escherichia coli bgl operon is of interest, since its expression is silent (phenotypically Bgl-), at least under standard laboratory conditions. Here we attempted to identify a trans-actingExpand
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Recommendations for the performance of bacterial mutation assays.
At the International Workshop on the Standardisation of Genotoxicity Test Procedures, in Melbourne (27-28 February 1993), the current international guidelines for the correct conduct of bacterialExpand
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Dominant negative umuD mutations decreasing RecA-mediated cleavage suggest roles for intact UmuD in modulation of SOS mutagenesis.
The products of the SOS-regulated umuDC operon are required for most UV and chemical mutagenesis in Escherichia coli. The UmuD protein shares homology with a family of proteins that includes LexA andExpand
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rpoS function is essential for bgl silencing caused by C-terminally truncated H-NS in Escherichia coli.
From evolutionary and physiological viewpoints, the Escherichia coli bgl operon is intriguing because its expression is silent (Bgl(-) phenotype), at least under several laboratory conditions. H-NS,Expand
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Organization and repression by juvenile hormone of a vitellogenin gene cluster in the crustacean, Daphnia magna.
Two Daphnia magna vitellogenin (VTG) genes in neighboring but opposite orientations were identified. One was the gene for DmagVTG1, a previously characterized VTG polypeptide with a superoxideExpand
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A vitellogenin chain containing a superoxide dismutase-like domain is the major component of yolk proteins in cladoceran crustacean Daphnia magna.
A cDNA encoding vitellogenin (VTG), a precursor of a major yolk protein, vitellin (VTN), was isolated from cladoceran crustacean Daphnia magna. The deduced amino acid sequence of DmagVTG1, theExpand
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Tea tannin components modify the induction of sister-chromatid exchanges and chromosome aberrations in mutagen-treated cultured mammalian cells and mice.
The modifying effects of tannin components extracted from green tea and black tea on mutagen-induced SCEs and chromosome aberrations were studied. These tannin components did not affect spontaneousExpand
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Cloning and analysis of a cDNA encoding a two-domain hemoglobin chain from the water flea Daphnia magna.
A cDNA encoding a two-domain hemoglobin (Hb) chain of Daphnia magna was cloned and its nucleotide (nt) sequence of 1261 bp was determined. The nt sequence contained 74 bp of the leader sequence, 1047Expand
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