_ stats: contacts=5 Nring=3 specif=0.60 _ PDBs: 1:5e69_A,2:1hcq_E, _ -lnE: 1:11.1,2:10.7, _ 1 2 0021 G --EC 0024 K* KAKG 0025 V* VAAG 0028 K --KG 0029 R* RARG