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

_ stats: contacts=8 Nring=2 specif=0.25
_ PDBs:  1:4cyc_B,2:6fqq_E,3:8ejp_B,4:8b4b_W,
_ -lnE:  1:8.2,2:8.2,3:7.8,4:7.1,
_        1 2 3 4
0001 T  RT------
0039 Q  ------ST
0041 K  ------TA
0042 I* NTNCVTQC
0045 Q  --ITQTST
0046 N* NANANA--
0049 A  IARG----
0050 K  RGRGRG--