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Proteins in grains of wheat-barley chromosome addition lines and in a protein-enriched concentrate from beer (Fraction X) were compared by tandem crossed immunoelectrophoresis. Two major beer proteins, called Antigen 1a and 1b, were found to be products of distinct structural genes positioned on barley chromosomes 4 and 7, respectively.
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J. Hejgaard (1984) studied this question.
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