Matrix of similar interfaces for 3D-footprint entry 2stt_A

_ stats: contacts=6 Nring=4 specif=0.67
_ PDBs:  1:8smh_F,
_ -lnE:  1:11.6,
_        1
0067 E* QC
0068 K  KT
0071 R* RG
0072 G  AT
0074 R* RG
0075 Y* NT