SPACI score report for 3b94 in ASTRAL 2.07:

PDB Entry: 3b94
SPACI score: 0.24
AEROSPACI score: 0.24

Experiment type: XRAY
Resolution: 2.5
R-factor: 0.221
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.168
WCK2 WHAT_CHECK Ramachandran: -4.183
WCK3 WHAT_CHECK Chi angles: -4.526
WCK4 WHAT_CHECK Backbone: -3.527

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).