Matrix of similar interfaces for 3D-footprint entry 6m4d_C

_ stats: contacts=2 Nring=1 specif=0.50
_ PDBs:  1:8txv_G,2:8u14_G,3:8kcb_A,
_ -lnE:  1:13.2,2:13.2,3:8.1,
_        1 2 3
0029 R* RGRTRG
0064 R  ----RG