Table 3. Refinement statistics.

Protein	eqFP650	eqFP670
No. of protein atoms	3671	3951
No. of solvent atoms	280	360
Resolution range (Å)	30.0–1.8	30.0–1.6
R work	0.189	0.179
R free	0.211	0.197
R.m.s. deviation bond lengths (Å)	0.014	0.013
R.m.s. deviation angles (°)	1.64	1.58
R.m.s. deviation chirality (Å3)	0.12	0.11
R.m.s. deviation planarity (Å)	0.007	0.007
R.m.s. deviation dihedral (°)	17.1	17.6
Mean B factors (Å2) for protein atoms
Overall	32.8	24.0
Main chain	30.8	22.4
Side chain	34.7	25.6
Ramachandran statistics (%) (for non-Gly/Pro residues)
Most favorable	92.7	92.4
Additional allowed	7.3	7.6