TMPRSS11D and rheumatoid arthritis: HAT activity was lower in AS compared to HC (68.2 ± 8.1 vs 111.3 ± 15.5 ng/h/mg; p = 0.05) while it was higher in RA, but the difference was not significant (126.8 ± 16.4 vs 111.3 ± 15.5 ng/h/mg; p > 0.05) (Table 2, Figure 1A).