what is net peptide content?
All dried peptides will contain a variable amount of water plus a fixed amount of the peptide counter-ion, usually trifluoroacetic acid. Quantitative amino acid analysis is the only method which enables the net peptide content to be determined. Here, the amount of each amino acid is measured after total acid hydrolysis, the sum total of which gives the amount of peptide in the product. Typical values for net peptide content range from 70% – 90% but in extreme cases can be as low as 20%.
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05/28/2009