Conjugation process of bacterial polysaccharides to carrier proteins
First Claim
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1. A process for conjugating a bacterial saccharide and reducing the sizing effect on bacterial saccharide comprising the steps ofa) reacting the bacterial saccharide with 0.001-0.7 molar equivalents of periodate to form an activated bacterial saccharide;
- b) mixing the activated bacterial saccharide with a carrier protein;
c) reacting the activated bacterial saccharide and the carrier protein with a reducing agent to form a conjugate;
wherein step a) occurs in a buffer which does not contain an amine group, and the buffer has a concentration between 1-100 mM and wherein the bacterial saccharide is S. pneumoniae capsular saccharide 6B.
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Abstract
Process for conjugation of bacterial saccharides including Streptococcus pneumoniae and Haemophilus influenzae saccharides by reductive amination are provided herein.
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10 Claims
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1. A process for conjugating a bacterial saccharide and reducing the sizing effect on bacterial saccharide comprising the steps of
a) reacting the bacterial saccharide with 0.001-0.7 molar equivalents of periodate to form an activated bacterial saccharide; -
b) mixing the activated bacterial saccharide with a carrier protein; c) reacting the activated bacterial saccharide and the carrier protein with a reducing agent to form a conjugate; wherein step a) occurs in a buffer which does not contain an amine group, and the buffer has a concentration between 1-100 mM and wherein the bacterial saccharide is S. pneumoniae capsular saccharide 6B. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification