4N6T:
reference: Adhiron: a stable and versatile peptide display scaffold for molecular recognition applications., Tiede C, Tang AA, Deacon SE, Mandal U, Nettleship JE, Owen RL, George SE, Harrison DJ, Owens RJ, Tomlinson DC, McPherson MJ, Protein Eng Des Sel. 2014 Mar 25. PMID: 24668773

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