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. 1984 Mar 12;12(5):2327–2341. doi: 10.1093/nar/12.5.2327

Analysis of a eukaryotic beta-galactosidase gene: the N-terminal end of the yeast Kluyveromyces lactis protein shows homology to the Escherichia coli lacZ gene product.

K D Breunig, U Dahlems, S Das, C P Hollenberg
PMCID: PMC318665  PMID: 6324114

Abstract

The LAC4 gene of Kluyveromyces lactis, encoding the enzyme beta-galactosidase was mapped on a cloned DNA fragment and the sequence of the 5' end was determined. This sequence includes the 5' regulatory region involved in the induction by lactose and the N-terminal end of the protein coding region. Comparison of the deduced amino acid sequence of this eukaryotic enzyme with the N-terminal end of the Escherichia coli beta-galactosidase revealed substantial homology. Two major RNA initiation sites were mapped at -115 and -105. A number of structural peculiarities of the 5'non-coding region are discussed as in comparison to Saccharomyces cerevisiae genes.

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Selected References

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