SPACI score report for 2cb9 in ASTRAL 2.06:

PDB Entry: 2cb9
SPACI score: 0.55
AEROSPACI score: 0.55

Experiment type: XRAY
Resolution: 1.8
R-factor: 0.152
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.555
WCK2 WHAT_CHECK Ramachandran: -0.959
WCK3 WHAT_CHECK Chi angles: 0.79
WCK4 WHAT_CHECK Backbone: -0.224

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).