Matrix of similar interfaces for 3D-footprint entry 3x1t_H

_ stats: contacts=2 Nring=0 specif=-1.00
_ PDBs:  1:8siy_G,2:8he5_a,
_ -lnE:  1:9.6,2:9.6,
_        1 2
0002 E  --LG
0020 G  RTRA