X‐Ray Characterization of Melanins—II
- 1 August 1994
- journal article
- Published by Wiley in Pigment Cell Research
- Vol. 7 (4) , 263-273
- https://doi.org/10.1111/j.1600-0749.1994.tb00061.x
Abstract
Structural modeling of amorphous eumelanin has been carried out by comparing calculated data, S(q) and RDF(r), in reciprocal and real space, respectively, for limited random network models with the experimental X-ray scattering data of tyrosine melanin (Cheng et al., 1994). A basic picture of the atomic arrangements in amorphous eumelanin, which accounts for the short and intermediate range order, has been formulated. This reveals domains of a fundamental “particle” dimension of R∼ 15 Å, consisting of a paracrystalline array of disordered planar networks polymerized by 4-8 DHI monomers with a graphite-like stacking spacing of ∼ 3.45 Å, 4-5 layers thick.Keywords
This publication has 8 references indexed in Scilit:
- X-ray Diffraction Studies on Melanins in Lyophylized MelanosomesPigment Cell Research, 1990
- An accurate reappraisal of the elemental form factors and charge density of copperActa Crystallographica Section A Foundations of Crystallography, 1990
- Theoretical investigation of model polymers for eumelanins. I. Finite and infinite polymersThe Journal of Chemical Physics, 1990
- Random Packing of Structural Units and the First Sharp Diffraction Peak in GlassesPublished by Springer Nature ,1985
- Stereochemistry of rings. XIII. γ-lactone derivativesJournal of Molecular Structure, 1983
- PHOTOCHEMISTRY AND PHOTOBIOLOGY OF EPIDERMAL MELANINSPhotochemistry and Photobiology, 1982
- The Melanins: Their Synthesis and StructurePublished by Springer Nature ,1978
- The crystal structure of indoleActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1975