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ArticlesCopyright © 1990 by American Association for the Advancement of Science
Direct cloning of human transcripts with HnRNA from hybrid cell lines
Institute for Molecular Genetics, Baylor College of Medicine, Houston, TX 77030.
A library of human-derived complementary DNA from a human-hamster hybrid cell line containing the Xq24-qter region has been constructed. Complementary DNA synthesis was primed from heterogeneous nuclear (hn) RNA by oligonucleotides derived from conserved regions of human Alu repeats. At least 80% of these cloned sequences were of human origin, providing an enrichment of at least two orders of magnitude. Two clones, one containing a fragment of the primary transcript of the human hypoxanthine-guanine phosphoribosyltransferase (HPRT) gene at Xq26 and another recognizing a family of human genes mapping to two regions of Xq24-qter, were characterized. Additional hncDNA clones mapped to a variety of sites in the Xq24-qter region, demonstrating the isolation of many transcriptionally active loci. These clones provide probes for identification of genetic loci on the terminal region of the X chromosome long arm, which is the location of a number of inherited disorders.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)