SPACI score report for 2aar in ASTRAL 2.05:

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. The WHAT_CHECK parameters for this entry could not be obtained, and poor results have been arbitrarily assumed.

PDB Entry: 2aar
SPACI score: 0.03 (not valid)
AEROSPACI score: 0.03 (not valid)

Experiment type: XRAY
Resolution: 3.5
R-factor: 0.251
PCK1 PROCHECK Ramachandran: N/A
PCK2 PROCHECK Chi-1 angle: N/A
PCK3 PROCHECK H-bonds: N/A
WCK1 WHAT_CHECK Packing: N/A
WCK2 WHAT_CHECK Ramachandran: N/A
WCK3 WHAT_CHECK Chi angles: N/A
WCK4 WHAT_CHECK Backbone: N/A

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).