Changes in plasmin-plasminogen-plasminogen activator system in milk from Italian Friesian herds

alimentation animal husbandry methods bovin breeds (animals) cattle cows enzyme precursors epitelio epithelium feed intake feeding ganado bovino glande mammaire hatos herds italia italie italy lactation lactation stage lait leche mammary glands milk plasmin plasmina plasmine precursores de enzimas prise alimentaire (animaux) race (animal) razas (animales) somatic cell count troupeau vaca vache