_ stats: contacts=5 Nring=4 specif=0.80 _ PDBs: 1:5e69_A,2:1hcq_E, _ -lnE: 1:10.8,2:10.6, _ 1 2 0020 E* --EC 0023 K* KAKG 0024 A* VAAG 0027 K --KG 0028 R* RARG