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N-Glycan Separations: How HILIC Columns Affect Data Quality

 

Glycosylation can be a critical quality attribute (CQA) or product quality attribute (PQA) of biotherapeutic proteins, as the structure of N-linked glycans can influence protein function. Analysis of released N-glycans labeled with a dye that facilitates hydrophilic interaction liquid chromatography (HILIC) with detection by fluorescence (FLD) and/or mass spectrometry (MS) is a commonly used approach. The selection of an appropriate HILIC column for these separations is critical to ensure that glycans in complex mixtures are well-separated with minimal coelutions. Robustness in peak shape, retention time, and overall column lifetime are also often cited as important factors in choosing a suitable column.

 

Topics include:

  • Presentation of  data on biotherapeutic molecules showing the N-glycan separation performance of Agilent’s latest developmental HILIC LC column
  • Comparisons of key N-glycan separations alongside other popular columns
  • Discussion of key factors in column selection, such as selectivity, coelutions, peak shape, temperature stability, and longevity
  • Discussion on how mobile phase composition can affect N-glycan charge group selectivity
  • Comparisons of MS and FLD response

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