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Separations of Peptide Antibiotics by Reversed Phase HPLC, using Sigma-Aldrich Supelco Discovery Columns

Sigma-Aldrich Supelco
9 Aug 2015

Antibiotic 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 Supelco

Peptide 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.

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Discovery C18 HPLC Columns

Sigma-Aldrich Supelco

Classic 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

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UHPLC and HPLCHigh performance liquid chromatography (HPLC) and ultra high performance liquid chromatography (UHPLC), also known as UPLC, are analytical techniques used to separate, identify and quantitate components of complex mixtures including biological samples such as proteins and lipids as well as chemical mixtures of pesticides, drugs and oils. Both techniques are liquid chromatographic methods but differ by operating pressures (HPLC < 6000 psi < UHPLC ). Components of HPLC and UHPLC systems include columns, detectors, pumps, autosamplers and column heaters. Explore a range of UHPLC and HPLC columns for your specific sample needs including reverse phase, normal phase, ion exchange, HILIC, ion exclusion and size exclusion columns. For more specialized HPLC, explore FPLC, countercurrent LC and simulated moving bed systems. Find the best UHPLC and HPLC equipment in our peer reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.AntibioticsAntibiotics are substances that kill or inhibit the growth of microorganisms, such as bacteria and fungi. They are essential in the treatment of infections and in preventing disease spread. Explore antibiotics research and diagnostic tools in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Antibiotic ResistanceAntibiotic resistance poses a significant threat to public health driving innovation and change through antibiotic stewardship efforts. Ongoing research and diagnostic efforts focus on new treatments and detection methods. Explore antibiotic resistance research and diagnostic tools in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Reversed-Phase LC

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Separations of Peptide Antibiotics by Reversed Phase HPLC, using Sigma-Aldrich Supelco Discovery Columns