Merck, C0887-1.25KU, Chloroperoxidase from Caldariomyces fumago

Application
A useful alternative to lactoperoxidase for ¹³¹I ion labeling studies, for bromination of proteins, and for ³⁶Cl labeling of macromolecules in long-term isolation procedures.
Biochem/physiol Actions
Chloroperoxidase (CPO) is a 42,000 Da extracellular heme glycoenzyme containing ferriprotoporphyrin IX as the prosthetic group. CPO is secreted from fungus and exhibits a broad spectrum of chemical reactivities. It is a peroxide-dependent chlorinating enzyme. It also catalyzes peroxidase-, catalase- and cytochrome P450-type reactions of dehydrogenation, H₂O₂ decomposition and oxygen insertion, respectively. The enzyme has magnetic and spectroscopic properties similar to that of cyctochrome P-450. CPO from the fungus Caldariomyces fumago has the capacity to chlorinate aromatic hydrocarbons, including polycyclic aromatic hydrocarbons (PAHs).
Physical form
Purified suspension in 0.1 M sodium phosphate solution, pH approx. 4.5
Other Notes
One unit will catalyze the conversion of 1.0 μmole of monochlorodimedon to dichlorodimedon per min at pH 2.75 at 25 °C in the presence of potassium chloride and H₂O₂.