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Updated: Jun 4, 2026

Activation and Conjugation of Soluble Polysaccharides using 1-Cyano-4-Dimethylaminopyridine Tetrafluoroborate (CDAP)
Published on: June 14, 2021
Protein-polysaccharide conjugation
1Institute for Biological Science, National Research Council of Canada, Ottawa, On, Canada.
Abstract:
The use of bacterial capsular polysaccharides as immunoprophylactic agents in human diseases caused by encapsulated bacteria is now firmly established (1). However, despite their many advantages, they do have serious limitations. First, they induce an inadequate immune response in infants (2), the section of the population most vulnerable to bacterial meningitis, and second, some polysaccharides are only weakly immunogenic in adults. To overcome these deficiencies, a new generation of semisynthetic vaccines have been developed based on the conjugation of polysaccharide to protein carriers.
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Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Conjugated Proteins
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
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Oligosaccharide Assembly
Multiple sugar molecules that may or may...
Mechanism of Conjugation
Formation of Lipopolysaccharides

