Through this approach, we identified 2 additional IL-33 proteotypic peptides, namely MLMVTLSPTK (aa 180–189) and DNHLALIK (aa 243–250), which displayed increased levels in IC-induced versus untreated SLE NETs and PMA-treated healthy NETs (Figure 6B). The gene discussed is IL33; the disease is systemic lupus erythematosus.