-homocarnitine isotope tracer studies showed that mammalian cells produce short-, medium-, and long-chain acyl-homocarnitines. Ion dissociation analyses established diagnostic product ions to distinguish acyl-homocarnitines from isomeric acyl-carnitines. Sample preparation and chromatographic methods are provided to separate and analyze isomers in extracts of mouse tissues. These findings expand knowledge of carnitine analogs and establish analytical strategies to differentiate acyl-homocarnitines from isomeric acyl-carnitines.
Weinberg et al. (Wed,) studied this question.