SPACI score report for 1b3b in ASTRAL 1.55:

PDB Entry: 1b3b
SPACI score: 0.2
AEROSPACI score: 0.2

Experiment type: XRAY
Resolution: 3.1
R-factor: 0.225
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.034
WCK2 WHAT_CHECK Ramachandran: -2.269
WCK3 WHAT_CHECK Chi angles: -2.629
WCK4 WHAT_CHECK Backbone: 0.11

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).