For the phycoerythrin (PE) immunization the mice were injected subcutaneously with immunogen emulsion comprising 100 μl CFA (Thermo Fisher Scientific), 15 μg of R-PE (ProZyme, Cedarlane), and 100 μl PBS, vortexed for 45 min prior to the injection. For the immunization with sheep red blood cells (SRBCs), the mice were injected intravenously with 109 SRBCs (Innovative Research IC10-0210, Cedarlane) in 300uls of PBS. Immunization protocols were previously described (24 (link), 61 (link)).
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