Matrix of similar interfaces for 3D-footprint entry 1r8e_A

_ stats: contacts=5 Nring=3 specif=0.60
_ PDBs:  1:1r8e_A,2:7ckq_G,3:6ldi_G,
_ -lnE:  1:34.8,2:11.8,3:9.7,
_        1 2 3
0017 K* KCKGKG
0020 R* RTRTRT
0021 Y  --YGFC
0039 Y* YCYCYG
0040 R  --RT--