SPACI score report for 2cb8 in ASTRAL 2.02:

PDB Entry: 2cb8
SPACI score: 0.72
AEROSPACI score: 0.72

Experiment type: XRAY
Resolution: 1.4
R-factor: 0.172
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -0.414
WCK2 WHAT_CHECK Ramachandran: 2.484
WCK3 WHAT_CHECK Chi angles: 1.473
WCK4 WHAT_CHECK Backbone: 1.445

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).