Matrix of similar interfaces for 3D-footprint entry 3exj_A

_ stats: contacts=5 Nring=3 specif=0.60
_ PDBs:  1:3wts_A,
_ -lnE:  1:9.9,
_        1
0035 Q  RG
0146 N  RA
0175 A* VC
0176 C* DC
0179 R* RG