this nutl terminator shares several features with the other known sites of transcription termination , including ( i ) a uridine-rich 3 ' terminal rna sequences , -- uuaauuuuu-oh , ( ii ) a gc-rich region in the dna immediately preceding the site of termination , ( iii ) a region of dyad symmetry in the dna which , in transcript , is capable of forming a stable hairpin containing four gc base pairs and one au base pair in its stem .
C0000702
a
C0012854
dna