_ stats: contacts=5 Nring=4 specif=0.80 _ PDBs: 1:5e69_A,2:1hcq_E, _ -lnE: 1:10.7,2:10.2, _ 1 2 0019 E* --EC 0022 K* KAKG 0023 G VAAG 0026 R* --KG 0027 R* RARG