Ribosomal RNA cistrons in Euglena gracilis
作者： N.Steele Scott
DOI: 10.1016/0022-2836(73)90144-7
关键词: RNA 、 Euglena gracilis 、 Ribosome 、 Chloroplast DNA 、 Ribosomal RNA 、 DNA 、 Molecular biology 、 Cytoplasm 、 Chloroplast 、 Biology
摘要: Abstract Euglena gracilis chloroplasts contain about 12 fg DNA of average density 1.686 g cm −3 and 1.7 pg RNA. The large (1.1 × 10 6 mol. wt) small (0.56 ribosomal RNA components are coded for by separate cistrons, both which band at a 1.696 in CsCl gradient. About 6% the chloroplast codes rRNA indicating that there 240 cistrons each or three to six per genome. Similar studies with from cytoplasmic ribosomes indicate 1.716 , denser than main-band DNA, 1000 cell. Fractionation E. on gradients subsequent hybridization experiments, as well melting curves DNA-RNA hybrids, show does not anneal specifically either any dark-grown cell, contrast those results found some higher plants.
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