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Research compounds by class
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Latest research notes
All notes →- Analysis and testing
KLOW: Four Compounds in One Vial, and What One Purity Figure Leaves Out
A CAS number names one substance; a molecular formula describes one molecule. KLOW is four of each, and the four differ in mass by a factor of 14.5 — enough that one purity percentage says less than it appears to.
- Compound overview
Glutathione: The Bond Written With a Greek Letter, and the Dimer It Turns Into
Three residues, but the first two are joined the wrong way round for a peptidase to notice. And the single sulfur is a thiol that would rather be a disulfide — so a vial of GSH is always, slowly, becoming a vial of GSSG.
- Characterisation
5-Amino-1MQ: Not a Peptide, and 44% of the Vial Is Iodide
On a peptide, an acetate counter-ion is about 7% of the weight. Here the counter-ion is iodide and it is 44%. A 100 mg vial holds roughly 56 mg of the cation, and the arithmetic is checkable from the formula on the product page.
