title: Musa paradisiaca stem juice as a source of peroxidase and ligninperoxidase.
abstract: Musa paradisiaca stem juice has been shown to contain peroxidase activity of the order of 0.1 enzyme unit/ml. The Km values of this peroxidase for the substrates guaiacol and hydrogen peroxide are 2.4 and 0.28 mM respectively. The pH and temperature optima are 4.5 and 62.5 degrees C respectively. Like other peroxidases, it follows double displacement type mechanism. At low pH, Musa paradisiaca stem juice exhibits ligninperoxidase type activity. The pH optimum for ligninperoxidase type activity is 2.0 and the temperature optimum is 24 degrees C. The Km values for veratryl alcohol and n-propanol are 66 and 78 microM respectively.
authors.affiliation: Department of Chemistry, D.D.U Gorakhpur University, Gorakhpur 273009, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Vernwal
authors.forename: R S
authors.initials: RS
authors.lastname: Yadav
authors.forename: K D
authors.initials: KD
authors.lastname: Yadav
mesh_terms: D010544:Peroxidases / Q000378:metabolism*; D018547:Plant Stems / Q000201:enzymology*; D019862:Zingiberales / Q000201:enzymology*
chemical_list: D010544:Peroxidases; C042858:lignin peroxidase