preclinical — animal, cell or mechanistic work — not yet about people
every claim resolves to its source
All 2 citations resolve to their original source. · 0 posts naming it, 0 members counted once each.
Summary
Most synthetic peptides are made by solid-phase synthesis, whose cleavage and purification steps leave cationic peptides as trifluoroacetate salts. · pmid:18035848
Mechanism
The classical exchange, freeze-drying several times with excess hydrochloric acid, works below pH 1 and can degrade the peptide. · pmid:18035848
History
Numerous studies report negative effects of trifluoroacetate salts in biological assays, and the counterion is commonly exchanged for chloride by freeze-drying from hydrochloric acid. · pmid:40872554
Proportion of the 2 claims about Trifluoroacetate salt standing at each tier. Community volume is shown on the Consensus tab beside this and is never averaged into it.
Living evidence history
2 resolved citations, oldest to newest, coloured by tier. Retractions and contradictions land here as they are recorded.
Structure
No structure representation on record. PepJunkie draws only what an authoritative record supplies; for a peptide that is the residue sequence, and none has been curated for Trifluoroacetate salt yet.
Dose evidence, rung by rung
No established safe human dose. Nothing on file establishes one. That is a statement about the evidence PepJunkie holds, not a promise about the molecule.
Approved-label dose· a resolved regulatory document names a labelled dose
nothing resolved on this rung
Studied human doses· resolved human studies at the established tier
nothing resolved on this rung
Observational evidence· resolved human data at the emerging tier: thin, or contested
nothing resolved on this rung
Community-reported protocols· protocol propositions from distinct members, counted once per human
nothing resolved on this rung
Preclinical evidence· resolved animal, cell or mechanistic work
Elimination and exchange of trifluoroacetate counter-ion from cationic peptides: a critical evaluation of different approaches. · pmid 18035848 · 2008
Towards a Consensus for the Analysis and Exchange of TFA as a Counterion in Synthetic Peptides and Its Influence on Membrane Permeation. · pmid 40872554 · 2025
2 resolved citations, 0 unresolved (an unresolved citation lends nothing). Community volume is its own rung and is never averaged into the evidence rungs.
Negative findings
failure is information
Nobody has filed a failure yet. Failures are information; this list is waiting for an honest one.