Table 2
 Expression in
E. coli
of mutant and wild type FECHs
FECH
mutation
FECH activity* (nmol mesohaem/min/nmol FECH)
Percent wild type activity
*FECH activities are means of triplicate measurements.
Wild type
2.5, 2.7
100
Q139L
0.46
18
C236Y
0.30
12
F260L
1.36
52
K379N
0.97
37