Glossary
TFA salt
A TFA salt is the form in which many synthetic peptides are isolated after reversed-phase HPLC purification with trifluoroacetic acid. Trifluoroacetate counter-ions pair with basic groups such as lysine, arginine, histidine and the free N-terminus. These counter-ions add to the gross weight of the powder, so net peptide content is lower than the weighed mass.
Source: en.wikipedia.org
Related terms
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