The activity of PA were determined with fibrin plate in specimens of 20 cholesteatoma and 8 normal external ear canal skins. The molecular weight of PA was tested by SDS polyacrylamide slab gel electrophoresis and fibrin autography.

• 方法 :用纤维蛋白板测定 2 0例胆脂瘤组织和 8例正常外耳道上皮提取液的纤溶酶原激活物 ,同时进一步运用sds-聚丙烯酰胺凝胶电泳和纤维蛋白自显影方法测定胆脂瘤组织提取液中 PA分子量。