An Amylose Antiparallel Double Helix at Atomic Resolution
- 9 October 1987
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 238 (4824), 205-208
- https://doi.org/10.1126/science.238.4824.205
Abstract
In the crystal structure of the polyiodide complex (p-nitrophenyl-α-maltohexaose2) · Ba(I3)2 · 22H2O, 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.This publication has 26 references indexed in Scilit:
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