SPACI score report for 2f9j in ASTRAL 2.06:

PDB Entry: 2f9j
SPACI score: 0.2
AEROSPACI score: 0.2 (mutant; see below)

Experiment type: XRAY
Resolution: 3
R-factor: 0.221
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -0.681
WCK2 WHAT_CHECK Ramachandran: -1.139
WCK3 WHAT_CHECK Chi angles: -3.992
WCK4 WHAT_CHECK Backbone: 3.264

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: "complex with peptide from Splicing factor 3B subunit 1 (SQ O75533 381-415), chains P and Q; mutant; automatically matched to 2F9J A:12-125; automated match to d3lqvb_"

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).