Figure 1
(a) The asymmetric unit of (I), with the atom numbering indicated. Displacement ellipsoids are drawn at the 50% probability level and H atoms are shown as spheres of arbitrary size. Bond lengths are normal, except that the O3—C8 and C9—C10 bonds in the allyl group are comparatively short at 1.395 (5) and 1.274 (7) Å, respectively. (b) The structure of Boc-L-Ala-Aib-L-Ala-OMe, (IV) [Cambridge Structural Database (Allen, 2002) refcode COLSOL; Bosch et al., 1984]. (c) The Pro139-Val142 segment of hAQP4 (PDB code 3GD8; Ho et al., 2009). |