Summary
Vicilin and legumin were extracted from developing seeds at different stages using the classical method of repeated isoelectric precipitations. The subunits of these two protein fractions were separated by SDS gel electrophoresis, and it was shown that the sub-unit structure of vicilin changed during development whereas that of legumin did not. Thus vicilin is not a single protein.
Vicilin was formed prior to legumin during seed development although the rate of synthesis of the latter was faster, so that in the mature seed the ratio of legumin to vicilin was about 4:1 by weight.
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Wright, D.J., Boulter, D. The characterisation of vicilin during seed development in Vicia faba (L.). Planta 105, 60–65 (1972). https://doi.org/10.1007/BF00385164
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DOI: https://doi.org/10.1007/BF00385164