Abstract
The authors describe the selection of cloned human DNA sequences, with a copy number not exceeding 1000 copies per diploid genome, and their testing for interindividual restriction fragment lengths and copy number of polymorphism (RFLCP). As a result of the investigation a DNA clone was found (TVRI-6), about 2.8 kilobase-pairs in size, for which an unusually high level of interindividual RFLCP was discovered. The TVRI-6 sequence was obtained from a bank of Pst I restriction fragments of human placental nuclear DNA cloned in pBR 322. The bank was analyzed by hybridization of colonies with phosphorus 32-labelled human nuclear DNA.
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