6MYK:
reference: Molecular Discrimination between Two Conformations of Sphingomyelin in Plasma Membranes., Endapally S, Frias D, Grzemska M, Gay A, Tomchick DR, Radhakrishnan A, Cell. 2019 Jan 25. pii: S0092-8674(18)31656-8. doi: 10.1016/j.cell.2018.12.042. PMID: 30712872

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