Table 2.

GALT activity in controls and galactosemic patients.

		GALT activity, µmol · (g Hgb)−1 · h−1
Study participants	Sample no.	Mean	Range	SD
Control	71	23.8	15.6–30.5	3.8
Duarte galactosemia variant	1	3.6	N/Aa	N/A
Classical galactosemiab	33	NDc	N/A	N/A

^aN/A, not applicable.

^bGene mutation of each sample can be found in online Supplemental Table 2.

^cND, nondetectable with limit of detection of 0.07% of controls (or 0.01 µmol · (g Hgb)⁻¹ · h⁻¹).