1) The ABH blood group activities of human erythrocytes exist mainly in the glycolipid and to a small extent in the glycoprotein fractions. The ABH blood group activities in the glycoprotein fraction are not significantly different between secretrs and non-secretors.2) The glycolipid fraction isolated from human gastric mucosa contains a moderate level of ABH and a fairly high level of Lewis activities.
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Takizawa et al. (1977) studied this question.
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