Construct: Included in a genomic 13.2kb NruI-BalI fragment containing nontranscribed spacer, external transcribed spacer, 18SrRNA, internal transcribed spacer, 28SrRNA and nontranscribed spacer DNA.
report comment: Site of insertion of a single rDNA transcription unit (including flanking and internal spacers) observed to form a "mininucleolus" in salivary gland polytene chromosomes.
report comment: Site of insertion of a single rDNA transcription unit (including flanking and internal spacers) observed to form a "mininucleolus" in salivary gland polytene chromosomes.