Abstract
Reductive amination is a relatively simple and convenient strategy for coupling purified polysaccharides to carrier proteins. Following their synthesis, glycoconjugates can be used to assess the protective capacity of specific microbial polysaccharides in animal models of infection and/or to produce polyclonal antiserum and monoclonal antibodies for a variety of immune assays. Here, we describe a reproducible method for chemically activating the 6-deoxyheptan capsular polysaccharide (CPS) from Burkholderia pseudomallei and covalently linking it to recombinant CRM197 diphtheria toxin mutant (CRM197) to produce the glycoconjugate, CPS-CRM197. Similar approaches can also be used to couple other types of polysaccharides to CRM197 with little to no modification of the protocol.
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