3. c.40.1 Methylesterase CheB, C-terminal domain Methylesterase CheB, C-terminal domain 3 layers: a/b/a, parallel beta-sheet of 7 strands, order 3421567 1a2o d1a2oa2 A:157-164,166-178,183-190,216-220,223-228 1chd d1chda_ A:157-164,166-178,184-190,216-220,223-228