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

_ stats: contacts=4 Nring=0 specif=-1.00
_ PDBs:  1:5zoe_A,
_ -lnE:  1:26.9,
_        1
0045 Q  AG
0046 A  VG
0048 R  QC
0056 R  MC