Berrens L, Maesen F
Clin Exp Immunol. 1972 Feb;10(2):383-9.
Pigeon droppings are known to constitute a highly potent source of antigens involved in the interstitial pulmonary disease known as `pigeon breeder's lung'. Among the heterogeneous mixture of components in extracts of the droppings, a powerful enzyme was encountered which exhibits hydrolytic activity on proteins and synthetic ester substrates. Some characteristics of the enzyme in crude extracts have been established. Preliminary results indicate that human blood serum contains no inhibitors for the enzyme.
鸽粪是已知的参与间质性肺病“鸽饲养者肺”的强效抗原来源。在鸽粪提取物的多种成分混合物中，发现了一种对蛋白质和合成酯底物具有水解活性的强大酶。已确定了粗提物中该酶的一些特性。初步结果表明，人血清中不含该酶的抑制剂。
