Table 2

 Expression in E. coli of mutant and wild type FECHs

FECH mutationFECH activity* (nmol mesohaem/min/nmol FECH)Percent wild type activity
*FECH activities are means of triplicate measurements.
Wild type2.5, 2.7100
Q139L0.4618
C236Y0.3012
F260L1.3652
K379N0.9737