title: Single crystals of V-amylose complexed with alpha-naphthol.
abstract: Lamellar square single crystals of V-amylose were obtained by adding alpha-naphthol to metastable dilute aqueous solutions of synthetic amylose chains with an average degree of polymerization of 100. The morphology and structure of the crystals were studied using low-dose transmission electron microscopy including high-resolution imaging, as well as electron and X-ray diffraction. The crystals are crystallized in a tetragonal P4(1)2(1)2 or P4(3)2(1)2 space group with unit cell parameters, calculated from X-ray diffraction data, a = b = 2.2844 nm (+/-0.0005) and c = 0.7806 nm (+/-0.001), implying the presence of two amylose chains per unit cell. High-resolution lattice images of the crystals confirmed that the amylose chains were crystallized as 8-fold helices corresponding to the repeat of four maltosyl units.
authors.affiliation: Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP 53, F-38041 Grenoble Cédex 9, France.
authors.forename: Mateus B
authors.initials: MB
authors.lastname: Cardoso
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Putaux
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Nishiyama
authors.forename: William
authors.initials: W
authors.lastname: Helbert
authors.forename: Martin
authors.initials: M
authors.lastname: Hÿtch
authors.forename: Nádya P
authors.initials: NP
authors.lastname: Silveira
authors.forename: Henri
authors.initials: H
authors.lastname: Chanzy
mesh_terms: D000688:Amylose / Q000737:chemistry*; D003460:Crystallization; D009284:Naphthols / Q000737:chemistry*; D010316:Particle Size; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D009284:Naphthols; D011108:Polymers; C029350:1-naphthol; D000688:Amylose