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Blood group A‐, B‐ and H‐activities were studied in glycolipid and glycoprotein fractions of human erythrocyte stroma derived from secretors and non‐seeretors. A‐ and B‐ but not H‐specificities were detected in stroma glycolipids irrespective of the secretor status of blood donors. On the other hand A‐, B‐ and H‐specificities in glycoprotein fractions of stroma were present only in erythrocytes of secretors. Glycoprotein extracts of stroma of non‐secretors did not contain A‐ and B‐specificity.
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Gardas et al. (1971) studied this question.
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