ceruloplasmin (cp) is a human plasma protein with multiple physiological functions including ferroxidase and oxidase activities. deficiency or inhibition of the enzyme may lead to some abnormalities, including iron deposition in several tissues and causes various pathological conditions in the body. direct interaction of cadmium (cd), a widespread, highly toxic environmental pollutant, with hum...

Protoporphyrinogen oxidase, an enzyme which catalyzes the oxidation of protoporphyrinogen IX to protoporphyrin IX in yeast cells, has been found in several mammalian tissues. It has been extracted from rat liver mitochondria by sonication in the presence of salt and detergent and partially purified. The enzyme is similar in many respects to yeast protoporphyrinogen oxidase. Based on its behavio...

BACKGROUND & OBJECTIVES High level of urinary oxalate substantially increases the risk of hyperoxaluria, a significant risk factor for urolithiasis. The primary goal of this study was to reduce urinary oxalate excretion employing liposome encapsulated oxalate oxidase in animal model. METHODS A membrane bound oxalate oxidase was purified from Bougainvillea leaves. The enzyme in its native form...

The specific activity of purified pyruvate oxidase can be increased by about 25-fold either by the binding of certain lipids or detergents to the protein, or, alternatively, by a proteolytic modification of the enzyme performed in the presence of both the substrate and cofactor. The conformational change in this peripheral membrane enzyme which is concomitant with lipid or membrane binding is a...

1. The 'xanthine oxidase' activity of rat liver supernatant, most of which behaves as an NAD+-dependent dehydrogenase (type D) can be rapidly converted into an oxidase (type 0) by thiol reagents such as tetraethylthiuram disulphide, copper sulphate, 5,5'-dithiobis(2-nitrobenzoic acid), N-ethylmaleimide and p-hydroxymercuribenzoate. Treatment with copper sulphate, if prolonged, leads to almost c...

Protoporphyrinogen IX oxidase is the last enzyme in the common pathway of heme and chlorophyll synthesis and provides precursor for the mitochondrial and plastidic heme synthesis and the predominant chlorophyll synthesis in plastids. We cloned two different, full-length tobacco cDNA sequences by complementation of the protoporphyrin-IX-accumulating Escherichia coli hemG mutant from heme auxotro...