[New genes interacting with the zeste gene in Drosophila melanogaster].

We have found that mutations in the enhancer of yellow, 1,2 and 3 loci strongly enhance the effect of zv77h-mutation (full inactivation of the zeste locus) on the white locus expression. Their effect is realized through the distal white enhancer which is located 1,1 kb upstream to the promoter. It is suggested that the protein products of enhancers of yellow 1,2 and 3 represent a family of proteins which, like zeste protein, are responsible for formation of contacts between elements located at a large distance in the genome.