Matrix of similar interfaces for 3D-footprint entry 8rbx_M

_ stats: contacts=7 Nring=1 specif=0.14
_ PDBs:  1:7zs9_e,2:3kwq_E,3:7unc_a,4:6iy2_A,5:7ccr_A,6:8grq_A,7:4xzq_E,
_ PDBs:  8:8hr1_E,9:7y7i_E,10:7nkx_f,11:7xyf_B,12:8ox0_C,13:6a5l_g,14:5x0y_G,
_ PDBs:  15:6g0l_D,16:1zla_C,17:8jla_C,18:7kbd_C,19:3wkj_D,20:7cvo_A,
_ -lnE:  1:13.4,2:13.4,3:13.4,4:13.4,5:13.4,6:13.4,7:13.2,8:13.2,
_ -lnE:  9:13.0,10:10.6,11:10.3,12:10.1,13:10.1,14:10.1,15:10.1,16:10.1,
_ -lnE:  17:10.1,18:9.9,19:9.9,20:9.7,
_        1 2 3 4 5 6 7 8 91011121314151617181920
0020 L  --LTLA------LTLCQC----------------------
0021 P  ------------------------------------IT--
0023 Q  --------------------------------------KT
0038 R* RTRCRGRGRGRTRCRTRG--RCRGRARG--RARGRT----
0071 R  ----------------------------RA----------
0072 V  ------------------KG--------------------
0073 T  ------------------------RA--------------