Nucleotide sequence of the intergenic spacer and the 18S ribosomal RNA gene from mustard (Sinapis alba)

From a rRNA repeating unit (9.1 kbp) of mustard we have sequenced the first internal transcribed spacer, the 5.8S rRNA gene, and the second internal transcribed spacer. Here, we present the nucleotide sequence of a 5500 bp fragment containing the 3' end terminus of the 25S gene (486 bp), the intergenic spacer (3204 bp), the 18S gene (1804 bp), and the first 6 nucleotides of the first internal transcribed spacer. The coding regions have been determined in homology to the equivalent genes of rice.