1QRR:
reference: Crystal structure of SQD1, an enzyme involved in the biosynthesis of the plant sulfolipid headgroup donor UDP-sulfoquinovose., Mulichak AM, Theisen MJ, Essigmann B, Benning C, Garavito RM, Proc Natl Acad Sci U S A 1999 Nov 9;96(23):13097-102. PMID: 10557279

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