passages.id: split_8_test_1649_passage
passages.type: progene_text
passages.text: We show that the 5' external transcribed spacer of the S. solfataricus pre - rRNA transcript contains a target site for a specific endonuclease , which recognizes a conserved sequence also existing in the early A0 and 0 processing sites of Saccharomyces cerevisiae and vertebrates .