Article révisé par les pairs
Résumé : By using the electrophoresis of hexosaminidases in very concentrated extracts containing leucocytes, fibroblastic cultures and normal amniotic cells, the 3 fractions are constantly separated. After thermal inactivation, the third fraction disappears almost completely, the A becomes weaker and the B becomes wider and more fluorescent. The 3 fractions seem to hydrolyse the heterosides of glucosamine more rapidly than that of galactosamine.