Abstract
Peroxidase activity was detected in cell-free extractsof strains of three species of the marine microalgae,Porphyridium purpureum, Phaeodactylumtricornutum and Dunaliella tertiolecta. However, no bromo- or chloroperoxidase activity wasdetected in any, using the standard 2-chlorodimedoneassay. Only the extract from P. purpureumoxidized iodide and this peroxidase was partiallypurified via anion-exchange chromatography. KI ando-dianisidine assay of the fractions indicatedthat only one peroxidase was present. Characterization of the thermally labile enzymesuggested that it is a heme-containing peroxidase,with a molecular weight of approximately 36,000.
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