4MPB:
reference: Structure-based mutational studies of substrate inhibition of betaine aldehyde dehydrogenase BetB from Staphylococcus aureus., Chen C, Joo JC, Brown G, Stolnikova E, Halavaty AS, Savchenko A, Anderson WF, Yakunin AF, Appl Environ Microbiol. 2014 Jul;80(13):3992-4002. doi: 10.1128/AEM.00215-14., Epub 2014 Apr 18. PMID: 24747910

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