The P insertion is in a positive orientation with respect to btn gene transcription.
Site of insertion of a single rDNA transcription unit (including flanking and internal spacers) observed to form a "mininucleolus" in salivary gland polytene chromosomes.
The P insertion is in a positive orientation with respect to btn gene transcription.
Site of insertion of a single rDNA transcription unit (including flanking and internal spacers) observed to form a "mininucleolus" in salivary gland polytene chromosomes.