SPACI score report for 1ar2 in ASTRAL 2.08:

PDB Entry: 1ar2
SPACI score: 0.14
AEROSPACI score: -1.86 (mutant; see below)

Experiment type: XRAY
Resolution: 2.8
R-factor: 0.28
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.432
WCK2 WHAT_CHECK Ramachandran: -2.501
WCK3 WHAT_CHECK Chi angles: -6.118
WCK4 WHAT_CHECK Backbone: -1.064

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOPe contain the phrase mutant. The full comment is: "disulfide-free mutant; VL of Bence-Jones protein REI; disulfide-free mutant"

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).