A: Crotonase/enoyl-CoA hydratase family protein D: Crotonase/enoyl-CoA hydratase family protein C: Crotonase/enoyl-CoA hydratase family protein B: Crotonase/enoyl-CoA hydratase family protein E: Crotonase/enoyl-CoA hydratase family protein F: Crotonase/enoyl-CoA hydratase family protein