SPACI score report for 2z4n in ASTRAL 2.07:

WARNING! The SPACI score for this entry is not valid. The PROCHECK parameters for this entry could not be obtained, and poor results have been arbitrarily assumed.

PDB Entry: 2z4n
SPACI score: -0.02 (not valid)
AEROSPACI score: -0.02 (not valid)

Experiment type: XRAY
Resolution: 4.45
R-factor: 0.263
PCK1 PROCHECK Ramachandran: N/A
PCK2 PROCHECK Chi-1 angle: N/A
PCK3 PROCHECK H-bonds: N/A
WCK1 WHAT_CHECK Packing: -4.567
WCK2 WHAT_CHECK Ramachandran: -6.898
WCK3 WHAT_CHECK Chi angles: -5.769
WCK4 WHAT_CHECK Backbone: -2.207

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).