TABLE 1.

Dehalogenase activity in crude extracts with highly chlorinated benzenes as electron acceptorsa

Added chlorobenzene congenerFirst dechlorination product(s)Specific activity ± SD (nkat/mg of protein)b
1,2,3-TCB1,3-DCB11 ± 0.7
1,2,4-TCB1,3-DCB, 1,4-DCB0.3 ± 0.0
1,3,5-TCB<0.05
1,2,3,4-TeCB1,2,4-TCB355 ± 21
1,2,3,5-TeCB1,3,5-TCB76 ± 1.7
1,2,4,5-TeCB1,2,4-TCB3 ± 0.1
PeCB1,2,3,5-TeCB, 1,2,4,5-TeCB171 ± 12
HCBPeCB0.4 ± 0.0
  • a Means of results of triplicate assays ± standard deviation.

  • b One nanokatal is defined as 1 nmol of dechlorination products formed per s at 25 °C.