Abstract
THE dimensions of a molecule of starch, according to the estimate of Lobry de Bruyn, are of the order of 50 Ångström units. Protein molecules containing sulphur in the form of a cystine group, if that sulphur amounts only to 1 per cent., as is commonly the case, must have a molecular weight of not less than 6000; and in the case of hæmoglobin, as is familiar, the percentage of iron points to a molecular weight nearly three times this value. The dimensions of protein molecules are probably, therefore, of the same order as those of the starch molecule.
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LEATHES, J. Molecular Size and Range of Molecular Attractions in Solutions. Nature 107, 138–139 (1921). https://doi.org/10.1038/107138a0
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DOI: https://doi.org/10.1038/107138a0
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