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![[Figure 4]](tz5069fig4mag.jpg)
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Figure 4
ANS binding sites 1, 2 and 3 in copy L of Hyp-1 (a) in relation to the (labelled) secondary-structure elements of the Hyp-1 fold, with ANS molecules in ball-and-stick representation, and (b) in van der Waals representation to emphasize the excellent fit to the shape of the binding pockets. The ANS molecules in (a) are shown in their 2Fo − Fc electron density contoured at 1.5σ. Dashed lines indicate hydrogen bonds to protein atoms. Additionally, Lys33 forms hydrogen bonds to ANS at site 3 in some copies of Hyp-1. (c) Covalent structure and IUPAC atom numbering of ANS (Jaskolski, 2013  ). |
![[Figure 4]](tz5069fig4.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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