@article {cite-key,
	title = {The Drosophila homolog of the mouse mammary oncogene int-1 is identical to the segment polarity gene wingless.},
	journal = {Cell},
	volume = {50},
	number = {4},
	year = {1987},
	month = {Aug},
	pages = {649{\textendash}657},
	abstract = {We have isolated the Drosophila melanogaster homolog (Dint-1) of int-1, a conserved cellular oncogene implicated in viral mammary tumorigenesis in mice. The deduced Dint-1 protein sequence contains 468 amino acids and starts with a hydrophobic leader; it is 54\% identical to the int-1 sequence, and all 23 cysteine residues are conserved. The putative Drosophila protein has an extra sequence of 85 amino acids, encoded on an additional exon. Dint-1 is expressed throughout development, but transcripts are barely detectable in adult flies. Hybridization in situ to embryos reveals a segmented pattern of expression. We show that Dint-1 and the segment polarity gene wingless are identical and map to the same location. The sequence of the gene suggests that the Dint-1/wingless protein functions in morphogenesis as a signal in cell-cell communication.},
	issn = {0092-8674 (Print); 0092-8674 (Linking)},
	author = {Rijsewijk, F and Schuermann, M and Wagenaar, E and Parren, P and Weigel, D and Nusse, R}
}
