作者: K Nath , A P Bollon
DOI: 10.1016/S0021-9258(17)39994-5
关键词: Restriction fragment 、 Restriction enzyme 、 Restriction fragment length polymorphism 、 Biology 、 Genomic library 、 Genetics 、 Molecular biology 、 Restriction map 、 Restriction site 、 EcoRI 、 Amplified fragment length polymorphism
摘要: Abstract The restriction endonuclease EcoR1 cleaves Saccharomyces cerevisiae DNA, which codes for ribosomal RNA (rRNA), into seven fragments, A second endonuclease, HindIII, the same yeast DNA two fragments. These enzymes each yield segments that total about 5.9 megadaltons. "repeat unit" of genes coding rRNA is thus megadaltons or 9000 base pairs long. HindIII-cleaved fragments as well one EcoR1-cleaved were purified and amplified by cloning in Escherichia coli. Three EcoR1-generated could then be ordered treating cloned HindIII with EcoR1. This led assignment sites. various hybridized directly from gel utilizing 32P-labeled 5 S, 5.8 18 25 S rRNA. Identification to final ordering gene adjacent 35 precursor groups occur a cluster following sequence: [5 S-spacer]-[spacer-18 S-5.8 S-25 S-spacer]-[spacer-5 S]. actual map presented.