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English: Scratchboard drawing of ribonuclease S (ribonuclease A cleaved by subtilisin between residues 20 and 21, but still folded). Crystal structure by H. W. Wyckoff & F. M. Richards in 1967.[1] Image hand-drawn by Jane S. Richardson in 1980 as the frontispiece to Anatomy and Taxonomy of Protein Structures.[2]
↑Wyckoff HW, Hardman KD, Allewell NM, Inagami T, Johnson LN, Richards FM (1967). "The structure of ribonuclease-S at 3.5 Å resolution". J Biol Chem242: 3984-3988.
↑Richardson JS (1981). "The Anatomy and Taxonomy of Protein Structures". Adv Protein Chem34: 167-339. DOI:10.1016/S0065-3233(08)60520-3.
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