Gpxs exist in multiple isoforms, with different cellular localization and different substrate specificity ( 2 O 2 , Prxs seem to be more active, given their higher intracellular concentration and rate constant ( GSH, exploiting the redox-active thiol residue (-SH) of cysteine, exerts its antioxidant function mainly via Gpxs-mediated reactions, which result in peroxide buffering with simultaneous oxidation of GSH to GSSG ( Besides the neutralization of free radicals produced in phase 1 liver metabolism of chemical toxins, GSH also participates in the protection from the resulting electrophilic substrates through the intervention of glutathione-S-transferases (GSTs)
Lyophilized peptides require specific storage conditions to maintain molecular integrity
For lyophilized material the labeled mass is total solid unless the documentation states otherwise, and total solid includes counter-ion and residual moisture as well as target compound
Furthermore, don't forget the importance of hydration
What they do not have is a body of controlled evidence showing that injecting them causes clinically significant weight loss independent of diet, exercise, and the rest of a supervised program
Peroxynitrite reductase activity of selenoprotein glutathione peroxidase: a computational study