The Milk Alkaline Proteinase Plasmin (Turkish with English Abstract)

Öz

Plasminis a trypsin-like alkaline serine proteinase originating in the blood. Most of the enzyme in milk is present as the inactive zymogen called plasminogen whereas a little amount of enzyme is active. Plasmin which is a heat-stable enzyme has activity on β-, αs1-, and αs2-CN. Because of its properties, most of the studies have been focused on its effects on cheese and UHT milk. In this review, plasmin system in milk, effects of plasmin on milk proteins and quality of milk products were investigated.

Anahtar Kelimeler

• Plasmin, milk, proteolysis

Süt Alkali Proteinazı Plazmin

Öz

Plazmin, tripsin benzeri, kan kaynaklı bir alkali serin proteinazdır. Sütte az miktarda aktif olmak üzere daha çok inaktif zimojeni olan plazminojen olarak bulunur. Isıya karşı dirençli bir enzim olan plazmin β-, αs1- ve αs2-kazeinler üzerine etkilidir. Bu nedenle süt ürünlerinin lezzet ve tekstürü üzerine de etkilidir. Bu özellikleri nedeniyle araştırmalar daha çok plazminin peynir ve UHT sütteki etkileri üzerine yoğunlaşmıştır. Bu derlemede, sütteki plazmin sistemi, plazminin süt proteinlerine ve süt ürünlerinin kalitesi üzerine olan etkileri incelenmiştir. 

Anahtar Kelimeler

• Plazmin, süt, proteoliz

Kaynakça

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