SPACI score report for 2b9o in ASTRAL 2.01:

PDB Entry: 2b9o
SPACI score: -0.14
AEROSPACI score: -0.14

Experiment type: XRAY
Resolution: 6.46
R-factor: 0.354
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -4.033
WCK2 WHAT_CHECK Ramachandran: -4.54
WCK3 WHAT_CHECK Chi angles: -5.14
WCK4 WHAT_CHECK Backbone: -0.16

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).