Matrix of similar interfaces for 3D-footprint entry 5bk4_6

_ stats: contacts=5 Nring=0 specif=-1.00
_ PDBs:  1:6raz_7,2:8btg_B,
_ -lnE:  1:21.6,2:10.5,
_        1 2
0250 S  AT--
0400 G  --RG
0418 M  --KA
0420 I  --QG
0424 V  --EG