Protamine, a kind of polycationic peptide originated from the sperm of different animal species, is effective, safe and worthy of exploitation as a new food preservative.

• 鱼精蛋白是存在于各类动物精巢组织中的一种多聚阳离子肽,是一种高效、安全、值得开发的新型天然食品防腐剂。