Nattokinase, the main active ingredient of natto, is a potent fibrinolytic enzyme and has a potent protein structure made up of a single polypeptide chain consisting of 275 amine acids.

• 纳豆激酶为纳豆的主要活性成分，是一种很有效的纤溶酶。内含由275氨基酸组成的单一多肽链构成的强力蛋白质结构。