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

_ stats: contacts=5 Nring=3 specif=0.60
_ PDBs:  1:2r5y_A,2:8g87_X,
_ -lnE:  1:8.4,2:7.5,
_        1 2
0042 I* ITVT
0045 K* QCCC
0046 N* NANA
0049 A  MCQA
0053 K  --RT