_ stats: contacts=4 Nring=3 specif=0.75 _ PDBs: 1:1r8e_A,2:6ldi_G, _ -lnE: 1:13.4,2:12.5, _ 1 2 0016 Y* KCKG 0019 R* RTRT 0020 F* --FC 0037 N YCYG