SPACI score report for 2z68 in ASTRAL 1.75:

PDB Entry: 2z68
SPACI score: 0.76
AEROSPACI score: 0.76

Experiment type: XRAY
Resolution: 1.58
R-factor: 0.18
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.012
WCK2 WHAT_CHECK Ramachandran: 0.526
WCK3 WHAT_CHECK Chi angles: 1.233
WCK4 WHAT_CHECK Backbone: 1.052

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).