Table 2. Protein structure evaluation indicators: Buccaneer indicators, R _work and R _free .

Whether a higher or lower value of the indicator is better is indicated.

Indicator	Optimal
Longest fragment	Higher
No. of residues built	Lower
No. of fragments	Lower
No. of sequenced residues	Higher
No. of residues uniquely allocated to a chain	Higher
Completeness by residues	Higher
Completeness by chain	Higher
R work	Lower
R free	Lower