Published in Lab Business Week, September 5th, 2004
According to a study from Canada, "the kinetic pathway of a trans-acting delta ribozyme includes an essential structural rearrangement involving the P1 stem, a stem that is formed between the substrate and the ribozyme. We performed cross-linking experiments to determine the substrate position within the catalytic center of an antigenomic, trans-acting, delta ribozyme."
"Substrates that included a 4-thiouridine either in position -1, +4, or +8 (i.e., adjacent to the cleavage site, or located either in the middle of or at the 3'-end of the P1 stem, respectively) were synthesized...
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