Organism	Sequence
Tetrahymena (protozoan)	5′–T T GGGG–3′ 3′–AAC C C C–5′
Saccharomyces (yeast)	5′–T1-6G TG2-3–3′ 3′–A1-6CAC2-3–5′
Caenorhabditis (nematode)	5′–T TAGGC–3′ 3′–AATC C G–5′
Vertebrate	5′–T TAGGG–3′ 3′–AAT CC C–5′
Arabidopsis (plant)	5′–T T TAGGG–3′ 3′–AAAT CCC–5′
Source: V. A. Zakian, Science 270:1602, 1995.