SPACI score report for 2b1f in ASTRAL 2.08:

PDB Entry: 2b1f
SPACI score: 0.6
AEROSPACI score: -1.4 (mutant; see below)

Experiment type: XRAY
Resolution: 1.5
R-factor: 0.238
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 1.234
WCK2 WHAT_CHECK Ramachandran: 2.021
WCK3 WHAT_CHECK Chi angles: 0.194
WCK4 WHAT_CHECK Backbone: 2.33

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: "automatically matched to 2B1F A:1-31; designed terameric mutant; automated match to d2b1fa1"

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).