Interrogation of an Enzyme Library Reveals the Catalytic Plasticity of Naturally Evolved [4+2] Cyclases. - Zorn K; Back CR; Barringer R; Chadimová V; Manzo-Ruiz M; Mbatha SZ; Mobarec JC; Williams SE; van der Kamp MW; Race PR; Willis CL; Hayes MA (Chembiochem : a European journal of chemical biology, 2023)