Keratin homogeneity in the tail feathers of Pavo cristatus and Pavo cristatus mut. alba.
Bottom Line: In the final structure, the crystalline beta-cores are fixed by the rest of the keratin molecule.The hydrophobic residues of the beta-core are locked into a zip-like arrangement.Structurally there is no difference between the blue and the white bird.
Affiliation: University of Vienna, Faculty of Physics, Strudlhofgasse 4, A-1090 Vienna, Austria.Show MeSH
Mentions: Another significant change concerns the angle between the first axial (A) and lateral (B) reflections, Fig. 6. It stems from the orientation of the keratin filaments along the long and the perpendicular axis, respectively. The angle strongly decreases over the first 50 mm of the rachis, beyond it remains constant at a value of 90°. This clearly indicates that the arrangement of the filaments at first is not perpendicular to their long axis, but differently inclined, until the length axis of the filament is perfectly perpendicular to their arrangement in the lateral direction.
Affiliation: University of Vienna, Faculty of Physics, Strudlhofgasse 4, A-1090 Vienna, Austria.