Matrix of similar interfaces for 3D-footprint entry 3g6t_A

_ stats: contacts=5 Nring=2 specif=0.40
_ PDBs:  1:4umm_E,2:5krb_G,
_ -lnE:  1:11.4,2:11.0,
_        1 2
0021 G  EAEC
0024 K* KGKG
0028 K  RT--
0029 R* RTRA
0054 K  RT--