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Description

Rouhani M

Displayed on the side of the seven-story Nasdaq building were advertisements promoting the companys dietary supplements and their power to optimize health. At first glance, LifeVantage, worth some $84 million, looks decidedly mainstream

Landscapes Life Sciences & Earth Sciences (AREA) Health & Medical Sciences (AREA) Engineering & Computer Science (AREA) Molecular Biology (AREA) Physics & Mathematics (AREA) Hematology (AREA) Chemical & Material Sciences (AREA) Biomedical Technology (AREA) Urology & Nephrology (AREA) Immunology (AREA) Bioinformatics & Cheminformatics (AREA) Bioinformatics & Computational Biology (AREA) Biophysics (AREA) Analytical Chemistry (AREA) Microbiology (AREA) Biotechnology (AREA) Proteomics, Peptides & Aminoacids (AREA) Food Science & Technology (AREA) Medicinal Chemistry (AREA) Cell Biology (AREA) Biochemistry (AREA) General Health & Medical Sciences (AREA) General Physics & Mathematics (AREA) Pathology (AREA) Spectroscopy & Molecular Physics (AREA) Investigating Or Analysing Biological Materials (AREA) Other Investigation Or Analysis Of Materials By Electrical Means (AREA) Abstract The present invention provides a method of stabilising a biological sample comprising glutathione (GSH) and glutathione disulfide (GSSG), comprising a) providing the biological sample comprising GSH and GSSG, b) contacting GSH and GSSG of the biological sample with a maleimide to obtain maleimide-alkylated GSH, c) separating excess maleimide from maleimide-alkylated GSH and GSSG, d) contacting maleimide-alkylated GSH and GSSG with a reducing agent such as TCEP under conditions which allow reduction of GSSG by the reducing agent such as TCEP to obtain further GSH, and e) contacting maleimide-alkylated GSH and GSH with a heavy isotopologue of the maleimide to obtain a heavy isotopologue of the maleimide-alkylated GSH