Matrix of similar interfaces for 3D-footprint entry 6u81_A

_ stats: contacts=16 Nring=8 specif=0.50
_ PDBs:  1:6u81_A,2:5zjt_B,3:6wig_A,4:1yrn_A,
_ -lnE:  1:18.5,2:8.2,3:7.9,4:7.4,
_        1 2 3 4
0001 R  RA------
0002 R  --RC----
0004 R  RTRTRA--
0045 Q  ------RT
0046 I  ITNTYAVA
0049 Q* QT--QTIT
0050 N  NANANANA
0053 S* SGITAAMC
0054 R  RARGRGRG
0060 R  RC------
0076 R* RA------
0079 R* RT------
0121 I* IT------
0124 Q* QT------
0125 N* NA------
0129 R* RG------