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The delta-aminolevulinate dehydratase (ALADH) polymorphism was studied in the Upper Silesian population, Poland. The frequency of ALADH*1 was 0.9417, and ALADH*2 was 0.0583. No rare or anomalous phenotype was found. The distribution of phenotypes in 148 mother-child pairs was determined. Comparison with other world populations was made.
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Ewa Raczek (1994) studied this question.
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