CAT and cystic fibrosis: CAT activity was registered as results 32.7 ± 21.60 U/mL for EA, 301.2 ± 19.00 U/mL for JR, and 295.1 ± 14.86 U/mL for CF, and 304.8 ± 13.74 U/mL for CMC(Figure 1C).