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. Author manuscript; available in PMC: 2013 Jul 5.
Published in final edited form as: Chem Commun (Camb). 2008 Dec 2;(5):568–570. doi: 10.1039/b819375d

Scheme 1.

Scheme 1

A self-cleaving hammerhead ribozyme located in the 5’ untranslated region of a transgene leads to gene silencing. Toyocamycin (1) inhibits ribozyme function and induces expression of an open reading frame (ORF). Using a caged toyocamycin (2), this process can be controlled with light.