title: Peroxidase activity in Aloe barbadensis commercial gel: probable role in skin protection.
abstract: A basic peroxidase (EC 1.11.1.7) (pl around 9.0) has been identified in commercial gel of Aloe barbadensis. In vivo, the activity is localised in the vascular system of inner aqueous leaf parenchyma. Some relevant properties of this basic peroxidase of Aloe have been investigated in leaf extract and in commercial gel where it is notably stable. The acid optimum pH (5.0) for activity and the low KM for H2O2 (0.14 mM) suggest that, when topically applied, Aloe peroxidase may scavenge H2O2 in skin surface.
authors.affiliation: Departamento de Biología Vegetal, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Esteban
authors.forename: J M
authors.initials: JM
authors.lastname: Zapata
authors.forename: L
authors.initials: L
authors.lastname: Casano
authors.forename: M
authors.initials: M
authors.lastname: Martín
authors.forename: B
authors.initials: B
authors.lastname: Sabater
mesh_terms: D000504:Aloe / Q000201:enzymology*; D005782:Gels; D010544:Peroxidases / Q000302:isolation & purification* / Q000494:pharmacology; D010946:Plants, Medicinal; D012867:Skin / Q000187:drug effects*
chemical_list: D005782:Gels; D010544:Peroxidases