Table 1. Summary of kinetic data.

Ribozyme	Metal ion	1 mM
		k′ (ep′); (min–1) (%)	k″ (ep″); (min–1) (%)
cis(W)	Mg	3.95 ± 0.75 (15)	0.14 ± 0.02 (23)
	Ca	2.16 ± 0.25 (29)	0.08 ± 0.02 (36)
	Mn	8.8 ± 3.9 (11)	0.18 ± 0.02 (40)
cis(L)	Mg	7.65 ± 0.92 (40)	0.44 ± 0.05 (36)
	Ca	5.61 ± 0.69 (45)	0.48 ± 0.07 (36)
	Mn	10.36 ± 1.61 (41)	0.49 ± 0.05 (44)
		kobs (EP); (min–1) (%)
		1 mM	10 mM
trans(S1)	Mg	0.19 ± 0.01 (92)	0.92 ± 0.07 (87)
	Ca	0.26 ± 0.02 (92)
	Mn	0.24 ± 0.02 (92)
trans(S2)	Mg	0.17 ± 0.01 (81)	1.32 ± 0.16 (86)
	Ca	0.20 ± 0.02 (90)	2.31 ± 0.32 (86)
	Mn	0.57 ± 0.04 (86)	1.87 ± 0.25 (86)