Formation and detection of RNA-DNA hybrid molecules in cytological preparations - PubMed (original) (raw)
Formation and detection of RNA-DNA hybrid molecules in cytological preparations
J G Gall et al. Proc Natl Acad Sci U S A. 1969 Jun.
Abstract
A technique is described for forming molecular hybrids between RNA in solution and the DNA of intact cytological preparations. Cells in a conventional tissue squash are immobilized under a thin layer of agar. Next they are treated with alkali to denature the DNA and then incubated with tritium-labeled RNA. The hybrids are detected by autoradiography. The technique is illustrated by the hybridization of ribosomal RNA to the amplified ribosomal genes in oocytes of the toad Xenopus. A low level of gene amplification was also detected in premeiotic nuclei (oogonia).
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