Antibodies binding to KIF13A (aa 1595–1682) also showed a higher prevalence in anti-MPO positive AAV patients compared to anti-PR3 positive patients (18% vs. 6%, p = 0.041), and a trend with increased prevalence in MPA patients compared to GPA patients (16% vs. 7%, p = 0.198). The gene discussed is MPO; the disease is granulomatosis with polyangiitis.