Mixtures of trifluoroethanol or hexafluoroisopropanol and dimethylformamide are not general applicability for peptide condensations catalized by trypsin - Bemquerer, M P; Liria, Cleber Wanderlei; Kitagawa, K; Miranda, Maria Terêsa Machini de; Tominaga, Mineko (Journal of Peptide Research, 1998)