Table 1.

Biochemical laboratory results

Result	Patient	Reference values
Urinary sulfur metabolites
Sulfite (test strip), μg/liter	100–250	None detected
Sulfite (quantitative assay),  μg/liter	108–211	None detected
Thiosulfate, mM	0.297–1.632	<0.100
S-Sulfocysteine, mM	0.240	0.006–0.030
Urinary oxypurines
Uric acid, mM	0.14	0.44–4.50
Xanthine, mM	0.04	0–0.46
Hypoxanthine, mM	0.05	0–0.18
Urothione, μM	0.23	0.16–1.9
Fibroblast sulfite oxidase activity, units/g soluble protein	None detected	6–23