3HAZ:
reference: Crystal structure of the bifunctional proline utilization A flavoenzyme from Bradyrhizobium japonicum., Srivastava D, Schuermann JP, White TA, Krishnan N, Sanyal N, Hura GL, Tan A, Henzl MT, Becker DF, Tanner JJ, Proc Natl Acad Sci U S A. 2010 Feb 16;107(7):2878-83. Epub 2010 Feb 1. PMID: 20133651

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