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PAD2 protein is only expressed in macrophages. Protein expression of PAD2 and PAD4 in freshly isolated monocytes (mono) from peripheral blood and in ex vivo differentiated macrophages (macro) of patients with RA (RA1–RA3) and healthy controls (HC1–HC3) was analysed by western blotting. Recombinant PAD2 or PAD4 proteins are included as controls. Molecular weight markers (kDa) are indicated on the left.
