Peptide Nanotubes: A Crystallographic Approach
109
(Benedetti 1977). In addition, all the geometric parameters [CA=CB; N–CA; CA–C
;
CB–CG; CA=CB–CG; N–CA=CB; N–CA–C
; CB=CA–C
] of the Phe residues in
the peptide molecule are in agreement with the previously reported values for Phe
residues in the literature (Jain and Chauhan 1996; Mathur et al. 2004; Singh and
Kaur 1996).
3.2.4 Molecular Conformation
Molecular conformation of dipeptide II with non-hydrogen atoms labelled is shown
in Fig. 11. It shows the thermal ellipsoidal representation ORTEP, (Johnson 1976).
Table 5 shows important torsion angles for the peptide.
Fig. 11 The asymmetric unit of V F with the atomic numbering scheme. Displacement ellipsoids
are shown at the 50% probability level. H atoms are shown as spheres of arbitrary size