Nature 391, 301–304 (1998)

The efficiency value (k cat/ K m) of cyproase 1 is equal to 0.2 × 104 M−1 s−1, and not to 0.7 × 104 M−1 s−1 as published. Also, the histidine at residue 104 titrates with a p K equal to 6.47 ± 0.16 and 6.74 ± 0.15 when measuring K cat and the k cat/ K m, respectively, and not to 6.74 ± 0.16 and 6.74 ± 0.15.