Abstract
Weak anion-exchange and reversed-phase high-performance liquid chromtographic methods for peptide separations were compared using a tryptic digest of “rat small myelin basic protein”. In these experiments, a number of tryptic peptides that were not resolved on the reversed-phase column could be separated on the weak anion-exchange column, and in other instances, as might be expected, reversed-phase chromatography provided better resolution of certain peptides than did the weak anion-exchange method. The results obtained strongly suggest that the combined use of these two methods of separation, which utilize different selectivities, can provide an excellent improvement in resolving power for a number of peptide separations.
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