assayed as control enzymes): Hex A activity was found to be very low (116 nmol/h/mg protein with three
controls run simultaneously giving an average value of 3588 nmol/h/mg protein). The father's Hex A activity
was 51% in plasma and 48% in leucocytes while the mother's Hex A activity was 45% in plasma and 61% in
leucocytes (Table 1).