Separations of Peptide Antibiotics by Reversed Phase HPLC, using Sigma-Aldrich Supelco Discovery Columns
9 Aug 2015Antibiotic resistance has become a major clinical problem so there is an urgent need to develop agents that act via novel mechanisms. In this application note, Bacitracin A and Virginiamycin M1 were analyzed by HPLC, using Discovery C18, Discovery C8, and Discovery RP-AmideC16 columns. These columns offer excellent resolution for this application.
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Discovery® BIO Wide Pore C18 HPLC Column
Sigma-Aldrich SupelcoPeptide maps generated by RP-HPLC provide valuable information about protein structure, stability, and purity. To be effective, the RP-HPLC column must be able to resolve a high percentage of the peptides in the sample. The more peptides, the better the information. Discovery BIO Wide Pore C18 gives unsurpassed RP-HPLC resolution of peptide maps from enzymatic digests. The improvements in silica and bonded-phase chemistry we have incorporated into the Discovery BIO Wide Pore line improve resolution by increasing efficiency and reducing the peak tailing. An added benefit to this is the ability to analyze peptides without TFA in the mobile phase, thereby increasing the LC-MS signal.
Discovery C18 HPLC Columns
Sigma-Aldrich SupelcoClassic reversed-phases for all general-purpose applications. Features: Excellent peak shape and efficiency compared to competitive columns Classic reversed-phase retention and selectivity Excellent, no-bleed character for LC-MS applications C18 is generally more retentive than the C8 Column Details: Chemistry: C18 Particle Size: 5 µm Pore Size: 180 Å Length: 20, 30, 50, 100, 125, 150, 250 mm ID: 2.1, 3.0, 4.0, 4.6, 10.0, 21.2 mm