Using a group I intron {TAIL ~ derived ribozyme} from Tetrahymena thermophila, the sequence of RE1 was mutated and {HEAD ~ the resultant ribozyme} then bound to a new, complementary substrate (Murphy, F. L. & Cech, T. R. Proc 
Using a group I intron { TAIL ~ derived ribozyme } from Tetrahymena thermophila , the sequence of RE1 was mutated and { HEAD ~ the resultant ribozyme } then bound to a new , complementary substrate ( Murphy , F. L. & Cech , T. R. Proc
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH