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![[Figure 2]](fa3314fig2mag.jpg)
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Figure 2
The crystal packing of (a) (I) ![[link]](../../../../../../logos/arrows/c_arr.gif) , (b) Pro–Val (CSD refcode BIBVOX; Narasimhan et al., 1982) and (c) Ser–Val (EYIVAJ; Moen et al., 2004). Symbols for symmetry elements are included with pseudo-elements as open symbols in (a). In (a), peptide molecules A and B have C atoms in light and dark grey, respectively (in the electronic version of the paper, O1W is yellow and O2W is violet). A pair of water molecules are shown in a space-filling representation. Two different hydrogen-bonded sheets, seen here edge-on, are highlighted in grey, while a pair of Ser side chains that break the regular twofold screw symmetry are inside a dashed ellipse. The dashed circle in (c) highlights hydrogen bonding, see Comment for details. |
![[Figure 2]](fa3314fig2.jpg)
 | STRUCTURAL CHEMISTRY |
ISSN: 2053-2296
