Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The L-21 Tetrahymena ribozyme. The major structural domains, P4–P6 and P3–P7, are delineated with rectangles. The P3 sequence targeted by complementary oligonucleotide probes in folding assays is highlighted with a bold line. The A183U mutation is indicated by an arrow on the left.
