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Teratocarcinoma stem cell F9 expressed a potent fucosyltransferase activity acting on asialofetuin. A majority of the product was susceptible to alpha-L-fucosidase I from almond emulsin, indicating that the linkage formed was mainly Fuc alpha 1 leads to 3GlcNAc. The specific activity of the transferase decreased when the stem cells were induced to differentiate into parietal endoderm cells by retinoic acid and dibutyryl cyclic AMP. Furthermore, PYS-2 cell, a parietal endoderm cell line virtually lacked the transferase. The change in the fucosyltransferase activity could be correlated with cell surface changes occurring during differentiation.
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Muramatsu et al. (1983) studied this question.
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