Matrix of similar interfaces for 3D-footprint entry 7kbd_C

_ stats: contacts=2 Nring=1 specif=0.50
_ PDBs:  1:8u14_G,2:8txv_G,3:8kcb_A,4:8smw_G,
_ -lnE:  1:15.2,2:15.2,3:7.7,4:7.1,
_        1 2 3 4
0028 R* RTRGRGRT
0063 R  ----RG--