SPACI score report for 1b2s in ASTRAL 1.55:

PDB Entry: 1b2s
SPACI score: 0.51
AEROSPACI score: 0.51

Experiment type: XRAY
Resolution: 1.82
R-factor: 0.194
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 3.389
WCK2 WHAT_CHECK Ramachandran: 0.29
WCK3 WHAT_CHECK Chi angles: 0.938
WCK4 WHAT_CHECK Backbone: 0.661

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).