[P elements comprising mini-white marker gene suppression features in intergenic regions of Drosophila melanogaster genome].

12 492 intergenic regions were stratified into four classes according to protein coding genes mutual orientation flanking an intergenic region. It was revealed that transposon insertion sites number linearly correlates with number of promoters (none, one, or two) in an intergenic region. The vast majority oftransposons reside in intergenic regions with two promoters. Remarkably, the suppression manifestation, on the contrary, was most pronounced in ("promoterless" intergenic regions. Discussion of the phenomenon is based on the chromatin state analysis of various intergenic regions.