alexa The behaviour of peptides on reverse-phase supports during high-pressure liquid chromatography.
Immunology

Immunology

Immunochemistry & Immunopathology

Author(s): Wilson KJ, Honegger A, Sttzel RP, Hughes GJ

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Abstract High-pressure ('performance') liquid chromatography has been used to investigate the reverse-phase chromatographic behaviour of peptides, ranging in length from 2 to 65 amino acid residues, which have originated from primary-sequence determinations or solution/solid-phase syntheses. By using a pyridine/formate-pyridine/acetate/propan-1-ol buffer system, as previously described [Hughes, Winterhalter & Wilson (1979) FEBS Lett. 108, 81-86], the influence of various experimental parameters were examined. (a) Peptide retention was observed to be temperature-independent between 25 and 55 degrees C. (b) The dependence of chromatographic retention on pH decreases with increasing peptide hydrophobicity. (c) Chromatographic results from C8- and C18-chain-length, as well as from 5 micrometers- and 10 micrometers-particle-size, supports were comparable. (d) The hydrophobic strength of the organic solvent in the mobile phase was observed to decrease: propan-1-ol approximately equal to propan-2-ol greater than acetonitrile much greater than methanol. (e) When gradient rates (\% of buffer B/unit time) were systematically decreased, peptide retention decreased in a hyperbolic manner. Comparisons of the peptides chromatographed with respect to their measured retention properties and calculated hydrophobicities were performed by computer analysis. Deviation of peptide chromatographic behaviour was observed to be essentially independent of hydrophobicity, chain length and charge. On the basis of the measured retention properties of the chromatographed peptides, hydrophobic constants for the various amino acid side chains were determined and compared with similar constants available from the literature.
This article was published in Biochem J and referenced in Immunochemistry & Immunopathology

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