An enhancer responsible for activating transcription at the midblastula transition in Xenopus development

Paul A Krieg, D. A. Melton

Research output: Contribution to journalArticle

37 Scopus citations


Transcripts from the Xenopus gene GS17 are absent from oocytes and first appear at the midblastula transition (MBT), about 8 hr after fertilization. Injection experiments with deletions of the GS17 gene and GS17-β-globin hybrid genes show that a relatively short sequence of 74 base pairs is sufficient to activate, in cis, transcription at the MBT. This 74-base sequence is located about 700 bases upstream of the GS17 promoter and has the properties of an enhancer element.

Original languageEnglish (US)
Pages (from-to)2331-2335
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number8
Publication statusPublished - 1987
Externally publishedYes


ASJC Scopus subject areas

  • General
  • Genetics

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