| 摘要 |
1,256,020. L-asparaginase. FARBENFABRIKEN BAYER A.G. 24 Dec., 1969 [24 Dec., 1968], No. 62860/69. Heading C3H. A process for the preparation of L-asparaginase having a low pyrogen content comprises the fractional precipitation with a polyalkylene glycol of L-asparaginase from an aqueous solution of L-asparaginase at 40-60‹ C. in the presence of glycine. The preferred glycol is polyethylene glycol. The matter of Claim 1 of Specification 1,212,139 is disclaimed. |
