Table 2. Refinement statistics.

	AdoP–SO4	AdoP–Ado–SO4	AdoP–Ino–SO4	D204N–Ado–SO4	D204N–Ino–SO4
PDB code	3uav	3uaw	3uax	3uay	3uaz
Resolution (Å)	1.4	1.2	1.2	1.4	1.4
Rwork†	0.149	0.125	0.128	0.137	0.140
Rfree‡	0.163	0.141	0.148	0.152	0.155
R.m.s.d. bond lengths (Å)	0.009	0.013	0.008	0.009	0.009
R.m.s.d. bond angles (°)	1.282	1.348	1.292	1.299	1.316
R.m.s.d. B, main chain/side chain (Å2)	1.4/2.9	0.7/1.3	0.8/1.4	1.3/2.9	1.4/2.9
Average B factors (Å2)
Main chain/side chain	16.9/22.5	12.8/15.4	12.4/15.4	13.6/18.5	14.6/18.8
Nucleoside	—	10.3	12.0	10.4	13.9
Sulfate	18.6	10.1	10.9	12.0	14.8
Solvent	30.7	27.1	28.8	28.4	28.4
No. of protein atoms	1731	1747	1699	1756	1755
No. of water molecules	182	204	218	207	195
Ramachandran plot (%)
Most favored regions	91.0	92.7	91.9	92.7	91.3
Additionally allowed regions	9.0	7.3	8.1	7.3	8.7

^† R _work = , where F _obs and F _calc are observed and calculated structure factors, respect­ively.

^‡For R _free the sum extends over a subset of reflections (5%) that were excluded from all stages of refinement.