La impureza Decarboxylated S-Adenosylmethionine (CAS 22365-13-5) es un degradado descarboxilado que aparece durante la síntesis y el almacenamiento de S-adenosilmetionina; presenta mayor retención en cromatografía reversa y un patrón iónico característico en LC-MS con pérdida de 44 Da atribuible a CO2. Su presencia puede sesgar la pureza declarada y la cuantificación por HPLC | por lo que se recomienda monitoreo por LC-MS/MS y confirmación por 1H-NMR. El control se logra optimizando pH y temperatura | empleando agentes quelantes y estableciendo límites de especificación de lote típicos por debajo de 1.0% según guías analíticas.
Referencias
Hibasami, H., et al. “Decarboxylated S-Adenosylmethionine in Mammalian Cells.†Journal of Biological Chemistry, vol. 255, no. 14, July 1980, pp. 6675–78, https://doi.org/10.1016/S0021-9258(18)43623-X.
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