Isolation of the human insulin-like growth factor genes: insulin-like growth factor II and insulin genes are contiguous.

نویسندگان

  • G I Bell
  • D S Gerhard
  • N M Fong
  • R Sanchez-Pescador
  • L B Rall
چکیده

Overlapping recombinant clones that encompass the insulin-like growth factor (IGF) I and II genes have been isolated from a human genomic DNA library. Each gene is present once per haploid genome; the IGF-I gene spans greater than 35 kilobase pairs (kbp) and the IGF-II gene is at least 15 kbp. The exon-intron organization of these genes is similar, each having four exons, which is one more than the related insulin gene. Comparison of the restriction endonuclease cleavage maps of the IGF-II and insulin genes, including their flanking regions and hybridization with an IGF-II cDNA probe, revealed that they are adjacent to one another. The IGF-II and insulin genes have the same polarity and are separated by 12.6 kbp of intergenic DNA that includes a dispersed middle repetitive Alu sequence. The order of the genes is 5'-insulin-IGF-II-3'.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 82 19  شماره 

صفحات  -

تاریخ انتشار 1985