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

_ stats: contacts=4 Nring=2 specif=0.50
_ PDBs:  1:1o4x_A,
_ -lnE:  1:8.0,
_        1
0042 I* VA
0046 N* NA
0049 A  QA
0053 K  RT