6LUM:
reference: Cryo-EM structure of trimeric Mycobacterium smegmatis succinate dehydrogenase with a membrane-anchor SdhF., Gong H, Gao Y, Zhou X, Xiao Y, Wang W, Tang Y, Zhou S, Zhang Y, Ji W, Yu L, Tian C, Lam SM, Shui G, Guddat LW, Wong LL, Wang Q, Rao Z, Nat Commun. 2020 Aug 25;11(1):4245. doi: 10.1038/s41467-020-18011-9. PMID: 32843629

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