Isolation and molecular weight of circular chloroplast DNA from Euglena gracilis.
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Centrifugation, Density Gradient↗
Biomedical subjects
O C Richards
Publications and source records attributed to O C Richards.
Circular DNA molecules associated with chloroplasts of spinach, Spinacia oleracea.
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Cell Fractionation↗
Effects of cycloheximide and of chloramphenicol on DNA synthesis in Euglena gracilis.
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Animals↗
Circular chloroplast DNA from Euglena gracilis.
Chloroplast DNA of the protozoan flagellate, Euglena gracilis, exists as circular molecules, 40 mum in contour length, as shown by electron microscopy and buoyant density analyses.
Cell Fractionation↗
Hybridization of Euglena gracilis chloroplast and nuclear DNA.
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Bacillus megaterium↗
18O labeling of deoxyribonucleic acid during synthesis and stability of the label during replication.
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Coliphages↗
DNA polymerase activity of cultured rheumatoid synovial cells.
Cultured synovial cells from 8 patients with rheumatoid arthritis (RA) and 7 subjects without joint disease were assayed and comapred for RNA-directed and DNA-directed DNA polymerase activity. No activity was found in either RA or control specimens using a synthetic RNA template that specificically detects oncornavirus RNA-directed DNA polymerase. The DNA-directed DNA polymerase activity of RA specimens was increased (P less than 0.10) in the high-speed pellet fraction of cell lysates. The possible relationship of these finding to virus infection in RA is disscussed.
Adult↗