SPACI score report for 2nz9 in ASTRAL 2.02:

PDB Entry: 2nz9
SPACI score: 0.13
AEROSPACI score: 0.13

Experiment type: XRAY
Resolution: 3.79
R-factor: 0.227
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.589
WCK2 WHAT_CHECK Ramachandran: -3.862
WCK3 WHAT_CHECK Chi angles: -4.196
WCK4 WHAT_CHECK Backbone: 0.942

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).