Abstract
A study of the iodine spectra of a number of glycogens and amylopectins and their β-amylase limit dextrins in the presence of half saturated ammonium sulphate has been carried out. The changes in the wavelength of maximum absorption (λmax) with iodine concentration, reveal differences in the chain-length distribution of mammalian and non-mammalian glycogens. Reduction of the iodine concentration results in an increase in λmax values with mammalian glycogens, a decrease with non-mammalian glycogens but with amylopectins the value λmax is much less dependent on iodine concen tration. The structural significance of these results is discussed.
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