the heterogeneous 5'- and 3'-termini of these rrna abut and map within two ctc motifs in tsi2 ( internal transcribed spacer 2 ) located at 50-65 and 4-20 base-pairs upstream from the homogeneous 5'-end of the 28 s rrna gene .
C0035701
rrna
C0035899
rrna gene