Microscopic examination of iodine‐stained waxy starches has shown the presence of linear (blue‐staining) components in the centres of the granules, corresponding with the points of intersection of the polarization crosses. This, and other evidence, is used in postulating a structure for the starch grain in which the proportion of linear to branched component decreases from the centre to the periphery; two ways in which this transition might occur are suggested.
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BAKER et al. (1951) studied this question.