| 摘要 |
PCT No. PCT/GB96/00423 Sec. 371 Date Nov. 20, 1997 Sec. 102(e) Date Nov. 20, 1997 PCT Filed Feb. 23, 1996 PCT Pub. No. WO96/26269 PCT Pub. Date Aug. 29, 1996A process for preparing thrombin which comprises treating a mixture comprising prothrombin, factor Xa, factor Va, and phospholipids with calcium ions, at a pH of 6.0-7.0 is provided. In particular the pH of 6.0-7.0 may be generated by the addition of the calcium ions or by buffering the preparation to a pH of 6.0-7.0. Thrombin preparations so produced may be subjected to further purification and are particularly stable even when substantially free of exogenous stabilizing agents such as proteins, sugars, polyol and mixtures thereof, and may be subject to freeze-drying and a virus inactivation by heat treatment. |
