title: An amylose antiparallel double helix at atomic resolution.
abstract: In the crystal structure of the polyiodide complex (p-nitrophenyl-alpha-maltohexaose(2)) . Ba(I(3))(2) . 22H(2)O, the maltohexaose units form an antiparallel, left-handed double helix with O-2 ... O-3 and O-6 ... O-6 hydrogen bonding and a central cavity that encloses two triiodide units. This structure contrasts with the parallel, left-handed double helix with no central cavity proposed for the A-and B-starch helix and the left-handed single helix in V-amylose and may be relevant for the stabilization of glycogen Structure.
authors.forename: W
authors.initials: W
authors.lastname: Hinrichs
authors.forename: G
authors.initials: G
authors.lastname: Büttner
authors.forename: M
authors.initials: M
authors.lastname: Steifa
authors.forename: C
authors.initials: C
authors.lastname: Betzel
authors.forename: V
authors.initials: V
authors.lastname: Zabel
authors.forename: B
authors.initials: B
authors.lastname: Pfannemüller
authors.forename: W
authors.initials: W
authors.lastname: Saenger