Characterization of cloned rat ribosomal DNA fragments |
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| Authors: | Motohiro Fuke Kenrick J Dennis and Harris Busch |
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| Institution: | (1) Department of Pharmacology, Baylor College of Medicine, 77030 Houston, Texas, USA;(2) Present address: Department of Molecular Genetics, Wadley Institutes of Molecular Medicine, 9000 Harry Hines Blvd., 75235 Dallas, Texas, USA |
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| Abstract: | Summary Two Charon 4A lambda bacteriophage clones were characterized which contain all and part of the 18S ribosomal DNA of the rat. One clone contained two Eco RI fragments which include the whole 18S ribosomal RNA region and part of 28S ribosomal RNA region. The other clone contained an Eco RI fragment which covers part of 18S ribosomal RNA region. There were differences between the two clones in the non-transcribed spacer regions suggesting that there is heterogeneity in the non-transcribed spacer regions of rat ribosomal genes. The restriction map of the cloned mouse ribosomal DNA. Eco RI, Hind III, Pst I, and Bam HI sites in 18S ribosomal RNA region were in the same places in mouse and rat DNA but the restriction sites in the 5 -spacer regions were different. |
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