Quantitative Analysis of Glycine Oligomerization by Ion-Pair Chromatography

This paper describes a method for the quantitative analysis of mixtures of glycine and its oligomers by ion-pair high-performance liquid chromatography (IP-HPLC), with a particular focus on applications in origins-of-life research. We demonstrate the identification of glycine oligomers (Glyn) up to 14 residues long—the approximate detectable limit of their solubility in water—and measurement of the concentration of these species in the product mixture of an oligomerization reaction. The molar response factors for higher oligomers of glycine—which are impractical to obtain as pure samples—are extrapolated from direct analysis of pure standards of n = 3–6, which established a clear linear trend. We compare and contrast our method to those in previous reports with respect to accuracy and practicality. While the data reported here are specific to the analysis of oligomers of glycine, the approach should be applicable to the design of methods for the analysis of oligomerization of other amino acids.

• Publication year

  2019

• Venue

  ACS Omega

• Publication date

  2019-07-26

• Fields of study

  Biology, Medicine, Chemistry

• Identifiers
  DOI 10.1021/acsomega.9b01492PMID 31460397PMCID 6681977
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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