Prevotella has been linked with rheumatoid arthritis (RA), as specific antigens of Prevotella, such as Pc-27 and N-acetylglucosamine-6-sulfatase (GNS), can trigger antigenic mimicry with RA joints (Scher et al., 2013; Pianta et al., 2017; Pianta et al., 2021). The gene discussed is GNS; the disease is rheumatoid arthritis.