摘要: Abstract By molecular hybridization experiments the homologies between ribosomal RNAs from a unicellular organism ( Gyrodinium cohnii ), three invertebrates Drosophila hydei, Chironomus thummi, Sciara coprophila an amphibian Xenopus laevis and mammal (mouse) were determined. Competition demonstrated that portions of these homologous regions are same in all tested, regardless animal species. This conclusion based on data was confirmed by comparative fingerprint analysis. The RNA sequences involved heterologous have higher A + T composition than bulk RNA. It appears competition two thirds conserved similar present 18 S RNA, remaining one third 28 is argued been during evolution due to their structural and/or functional role
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