Figure 1: A schematic starch granule, as mapped by X-rays. | Nature

Figure 1: A schematic starch granule, as mapped by X-rays.

From: The structure of starch

Figure 1

Waigh et al.1 see alternating shells of amorphous and crystalline material, with the amylopectin helices that form the crystal lying perpendicular to the shell. They also find that the granules are ellipsoidal rather than spherical, so the helices do not point to a single focus, implying that some elongated structure must initiate the growth.

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