SPACI score report for 4l0n in ASTRAL 2.08:

PDB Entry: 4l0n
SPACI score: 0.74
AEROSPACI score: 0.74

Experiment type: XRAY
Resolution: 1.4
R-factor: 0.163
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 1.933
WCK2 WHAT_CHECK Ramachandran: 1.833
WCK3 WHAT_CHECK Chi angles: 3.337
WCK4 WHAT_CHECK Backbone: 6.672

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).