[PSA] research peptides are not what most of this community thinks it is
Putting this at the top of the board where it belongs: research peptides are not what most of this community thinks it is. Net peptide content accounts for counterion, water and residual solvent. On some of these compounds the gap between purity and net content is substantial and entirely honest. Stocked lines and…
This. Asking what reference standard was used separates a real analytical claim from a plausible-looking one.
Research-use-only material is not approved for human use. In this catalogue that covers essentially everything, which is why the board discusses material and analytics rather than outcomes.
What lead time were you quoted for that line?
handling and storage vary enormously across this catalogue
What lead time were you quoted for that line?
This is the rule for anything unusual. Identity before anything else.
research-use-only material is not approved for human use
lead times on unusual lines are the thing to confirm up front
identity before purity, every time, for anything unusual
Push back: handling advice from one compound does not transfer to another just because both are peptides.
lead times on unusual lines are the thing to confirm up front
Disagreeing with this bit: handling for one compound does not transfer to another by default.
the less-tested the compound, the more the identity test matters
Purity methods differ by compound class. A gradient and wavelength developed for one peptide will not necessarily resolve the relevant impurities of another.