Phosphatidylserine decarboxylase: analysis of its action towards unsaturated and saturated phosphatidylserine and the effect of Triton X-100 on activity.
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Animals↗
Biomedical subjects
T G Warner
Publications and source records attributed to T G Warner.
New sensitive assay for phosphatidylserine decarboxylase based on the detection of CO2 from nonradiolabeled phosphatidylserine.
A new rapid assay for phosphatidylserine decarboxylase, which is sensitive in the nanomolar range, is described. Synthesis of radiolabeled phosphatidylserine for use as a substrate is not required, since the assay, unlike previous ones, is based on the detection of CO(2) liberated from unlabeled phosphatidylserine. The assay employs a gas chromatographic procedure for the analysis of methane formed by catalytic conversion of the CO(2) produced as a product of the enzymatic reaction.
Animals↗
Prenatal diagnosis of infantile GM 2 gangliosidosis type II (Sandhoff disease) by detection of N-acetylglucosaminyl-oligosaccharides in amniotic fluid with high-performance liquid chromatography.
Prenatal diagnosis of Sandhoff disease (infantile onset) at 16 weeks gestation has been made by detection and analysis of N-acetylglucosaminyl-oligosaccharides in amniotic fluid using high performance liquid chromatography. The elution profile for the branched chain oligosaccharides was identical with that obtained with neonatal and infantile Sandhoff urine. The concentration of the oligosaccharides in the fluid was 1/100th that of urine but when calculated relative to creatinine the levels were similar. No oligosaccharides were detected in normal control amniotic fluids (10 patients) at a similar gestational age. Based on the levels of the amniotic fluid oligosaccharides and the sensitivity limits of the assay, prenatal diagnosis of patients with the juvenile onset form of the disease may also be possible with this technique.
Acetylglucosamine↗