The double-helical nature of the crystalline part of A-starch.

@article{Imberty1988TheDN,
  title={The double-helical nature of the crystalline part of A-starch.},
  author={Anne Imberty and Henri D Chanzy and Serge P{\'e}rez and Alain Bul{\'e}on and V. Tran},
  journal={Journal of molecular biology},
  year={1988},
  volume={201 2},
  pages={365-78}
}
A new three-dimensional structure of the crystalline part of A-starch is described in which the unit cell contains 12 glucose residues located in two left-handed, parallel-stranded double helices packed in a parallel fashion; four water molecules are located between these helices. Chains are crystallized in a monoclinic lattice with a = 2.124 nm, b = 1.172 nm, c = 1.069 nm and gamma = 123.5 degrees, the c axis being parallel to the helix axis. Systematic absences are consistent with the space… CONTINUE READING