SPACI score report for 2c9s in ASTRAL 2.06:

PDB Entry: 2c9s
SPACI score: 0.78
AEROSPACI score: 0.78

Experiment type: XRAY
Resolution: 1.24
R-factor: 0.154
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.072
WCK2 WHAT_CHECK Ramachandran: 0.044
WCK3 WHAT_CHECK Chi angles: -0.142
WCK4 WHAT_CHECK Backbone: -0.223

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).