[Sequence of the central break region of the precursor of Drosophila 26S ribosomal RNA].

A 431 nucleotide sequence from the central break region of Drosophila 26S rRNA precursor has been established by sequencing the corresponding region of the 26S gene. The analysis of rDNA-mature 26S rRNA hybrids submitted to S1 nuclease digestion has allowed us to show that a 75 +/- 3 nucleotide A-U rich RNA fragment is excised during the processing of the precursor.