Glutarylcarnitine is the diagnostic metabolite for malonic aciduria and glutaric aciduria type I monitored in most tandem mass spectrometry newborn screening programmes.
Malonylcarnitine and Glutarylcarnitine are important diagnostic metabolites in the screening of dried blood spots by tandem mass spectrometry[1].
[1]. Johnson DW, et al. Stability of malonylcarnitine and Glutarylcarnitine in stored blood spots. J Inherit Metab Dis. 2004;27(6):789-90.