Structures of hydroxynitrile lyase HNL from Hevea brasiliensis to atomic resolution (3C6X, 3C6Y, 3C6Z, 3C70)are available and published by Schmidt et al.. Structures of Epoxide Hydrolase B from Mycobacterium tuberculosis and Its Complex with a Urea-Based Inhibitor are available (2E3J, 2ZJF) and published by Biswal et al..