Table 1.

The important distances (in Å) around the target cytosine at the ground state, the transition state of the concerted mechanism, and the difference

	Ground state	Transition state	Difference
OE1(Glu-119) to H41(cytosine)	2.03	2.00	−0.03
HE2(Glu-119) to N3(cytosine)	1.90	1.92	0.02
HH21(Arg-163) to O2(cytosine)	1.90	1.96	0.06
HE(Arg-165) to O2(cytosine)	1.57	1.64	0.07
SG(Cys-81) to C6(cytosine)	2.35	2.20	−0.15
C9(AdoMet) to C5(cytosine)	3.14	2.38	−0.76
C9(AdoMet) to S8(AdoMet)	1.81	2.18	0.37