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X‐Ray diffraction of oriented amylose fibers. II. Structure of V amyloses
Author(s) -
Zobel H. F.,
French A. D.,
Hinkle M. E.
Publication year - 1967
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1967.360050906
Subject(s) - chemistry , amylose , anhydrous , crystallography , folding (dsp implementation) , hydrate , diffraction , organic chemistry , starch , physics , optics , electrical engineering , engineering
Oriented amylose fibers in the V form were prepared and subjected to x‐ray analysis. Unit cells and the probable space group of P2 1 2 1 2 1 were determined for the V anhydrous and V hydrate forms of amylose; the analysis confirms previous predictions of these structures based on x‐ray powder patterns. Chain folding in V amyloses is discussed in view of crystallographic evidence and folding experiments conducted with space‐filling models. Reported also is evidence for amylose helices having diameters intermediate between 13.0 and 13.7 A.