The peptide conjugation to Maleimide Activated KLH was performed as described in the product manual of
Imject Maleimide Activated KLH (Product 77605, Thermo Scientific). Briefly, 10 mg/mL solution of peptide and KLH were mixed at pH 6.5 for 2 hours at room temperature. The maleimide groups in the maleimide-activated KLH react with free sulfhydryls in the sulfhydryl-containing peptide to form stable thioether bonds of KLH-conjugated peptide.
Khurana S., Ravichandran S., Hahn M., Coyle E.M., Stonier S.W., Zak S.E., Kindrachuk J., Davey RT J.r., Dye J.M, & Chertow D.S. (2020). Longitudinal human antibody repertoire against complete viral proteome from Ebola virus survivor reveals protective sites for vaccine design. Cell host & microbe, 27(2), 262-276.e4.