Table 2.

Binding affinities of AUCI for the closed complexes of different ribozymes, measured at pH 8.1 and in 50 mM Mg²⁺.

ribozyme	${\left(K_{\text{d}}^{\text{AUCI}}\right)}_{\text{closed}}\left(\mu \text{M}\right)$
A261OH	360 ± 40
A261F	290 ± 10
A261H	390 ± 100