title: Influence of breed, animal, and days of lactation on lactoperoxidase system components in goat milk.
abstract: Lactoperoxidase and thiocyanate content in goat milk from two Spanish breeds throughout 5 mo of lactation has been investigated. Mean lactoperoxidase for milk from Verata and Murciano-Granadina goats was .95 and 2.15 units/ml, respectively. Very low concentrations, .03 units/ml for Verata and .20 units/ml for Murciano-Granadina, were found for the first 24 h after kidding. Highest concentrations were detected at the end of lactation (135 to 150 d) for Verata and in midlactation (60 to 75 d) for Murciano-Granadina goats. Mean thiocyanate content was 5.76 ppm for Verata goats, without a distinct maximum throughout lactation, and 3.20 ppm for Murciano-Granadina goats, with maximum levels at final lactation stages. Activation of the lactoperoxidase system might be a useful procedure in preserving raw goat milk quality by addition of low levels of thiocyanate and hydrogen peroxide.
authors.affiliation: Departamento de Producción y Tecnología de Alimentos, Instituto Nacional de Investigaciones Agrarias, Madrid, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Zapico
authors.forename: P
authors.initials: P
authors.lastname: Gaya
authors.forename: M
authors.initials: M
authors.lastname: De Paz
authors.forename: M
authors.initials: M
authors.lastname: Nuñez
authors.forename: M
authors.initials: M
authors.lastname: Medina
mesh_terms: D000818:Animals; D001947:Breeding; D005260:Female; D006041:Goats / Q000502:physiology*; D007774:Lactation / Q000502:physiology*; D007784:Lactoperoxidase / Q000032:analysis*; D008892:Milk / Q000737:chemistry / Q000201:enzymology*; D013861:Thiocyanates / Q000032:analysis*
chemical_list: D013861:Thiocyanates; D007784:Lactoperoxidase