5KSJ:
reference: Structural and Functional Insight of Sphingosine 1-Phosphate-Mediated Pathogenic Metabolic Reprogramming in Sickle Cell Disease., Sun K, D'Alessandro A, Ahmed MH, Zhang Y, Song A, Ko TP, Nemkov T, Reisz JA, Wu H, Adebiyi M, Peng Z, Gong J, Liu H, Huang A, Wen YE, Wen AQ, Berka V, Bogdanov MV, Abdulmalik O, Han L, Tsai AL, Idowu M, Juneja HS, Kellems RE, Dowhan W, Hansen KC, Safo MK, Xia Y, Sci Rep. 2017 Nov 10;7(1):15281. doi: 10.1038/s41598-017-13667-8. PMID: 29127281

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