Matrix of similar interfaces for 3D-footprint entry 3m4a_A

_ stats: contacts=4 Nring=2 specif=0.50
_ PDBs:  1:3m4a_A,2:1a31_A,
_ -lnE:  1:15.8,2:8.9,
_        1 2
0080 R* RG--
0106 S  --NC
0140 K  --KA
0152 R* RG--