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. 1987 Mar;6(3):749–759. doi: 10.1002/j.1460-2075.1987.tb04817.x

Characterization and localization of the even-skipped protein of Drosophila.

M Frasch, T Hoey, C Rushlow, H Doyle, M Levine
PMCID: PMC553460  PMID: 2884106

Abstract

On the basis of homeo box cross-homology we have isolated the pair-rule gene even-skipped (eve) of Drosophila. The eve transcription unit appears to be less than 1.5 kb in length, and encodes a single mRNA of approximately 1.4 kb. The nucleotide sequence of genomic and cDNA clones indicates that the eve protein is composed of 376 amino acid residues, and that its homeo domain shares only approximately 50% amino acid identity with the homeo domains of previously characterized genes. Using antibodies raised against a beta-galactosidase fusion protein we show that the eve protein is distributed in a series of seven transverse stripes at the cellular blastoderm stage, and is localized primarily within the nuclear regions of those embryonic cells that express the gene. After gastrulation, seven weakly stained stripes of eve expression appear, resulting in a transient pattern that consists of a total of 14 evenly spaced stripes. Both the original and new stripes gradually disappear during germ band elongation. A second expression pattern emerges during neurogenesis, whereby eve protein is detected in discrete subsets of neurons in each of the ventral ganglia.

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