Protamine is a polycationic peptide found in the spermary tissue of different fish species,and it is effective and safe and worthy of exploitation as a new style natural food preservative.

• 鱼精蛋白是存在于各类鱼精巢组织中的一种多聚阳离子肽,具有高效、安全、功能性等特点,是值得开发的一种新型天然食品防腐剂。