Process for seperating alpha-1-proteinase inhibitor from COHN IV.sub.1 +1V.sub.4 paste
US5616693A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1996 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Jul 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S530/812
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The present invention is directed to a process for purifying alpha-1-PI. The process comprises providing an impure protein fraction which comprises alpha-1-PI. The impure protein fraction is suspended in an aqueous solution at pH 6. Insoluble proteins are recovered and resuspended in aqueous solution at pH 8.5. PEG is added to precipitate .alpha.-2 proteins. To the PEG supernatant precipitation, which comprises alpha-1-PI, is added ZnCl.sub.2 to precipitate crude alpha-1-PI. The crude alpha-1-PI is resolubilized and applied to an anion-exchange medium. A fraction comprising alpha-1-PI is recovered from the anion-exchange medium. Alpha-1-PI purified by the process has a specific activity about 1.0 units/OD.sub.280.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.