Matrix of similar interfaces for 3D-footprint entry 4pu3_C

_ stats: contacts=7 Nring=5 specif=0.71
_ PDBs:  1:7u0g_M,2:1o4x_A,
_ -lnE:  1:7.8,2:7.2,
_        1 2
0025 Q* QT--
0035 T* STSG
0036 K* QAQA
0037 K* TGTT
0038 T  TT--
0040 I* CT--
0041 R  RTRG