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

_ stats: contacts=5 Nring=4 specif=0.80
_ PDBs:  1:4cyc_B,2:5ego_B,3:8ejp_B,
_ -lnE:  1:8.0,2:8.0,3:7.3,
_        1 2 3
0113 V* NTIAVT
0116 C* --QTQT
0117 N* NANANA
0120 Q* IA----
0121 K  RG--RG