2TNF:
reference: The structure of mouse tumour-necrosis factor at 1.4 A resolution: towards modulation of its selectivity and trimerization., Baeyens KJ, De Bondt HL, Raeymaekers A, Fiers W, De Ranter CJ, Acta Crystallogr D Biol Crystallogr 1999 Apr;55 ( Pt 4):772-8. PMID: 10089307

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