2RJK:
reference: Biochemical and structural characterization of the human TL1A ectodomain., Zhan C, Yan Q, Patskovsky Y, Li Z, Toro R, Meyer A, Cheng H, Brenowitz M, Nathenson SG, Almo SC, Biochemistry. 2009 Aug 18;48(32):7636-45. PMID: 19522538

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