Chemistry: natural resins or derivatives; peptides or proteins; – Proteins – i.e. – more than 100 amino acid residues – Blood proteins or globulins – e.g. – proteoglycans – platelet...
Patent
1997-03-31
1999-11-09
Tsang, Cecilia J.
Chemistry: natural resins or derivatives; peptides or proteins;
Proteins, i.e., more than 100 amino acid residues
Blood proteins or globulins, e.g., proteoglycans, platelet...
530350, 530359, 530380, 530415, 530418, 530419, 530420, 530421, 530422, 530427, 530811, 530812, A61K 3514, C07K 1400
Patent
active
059817151
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.
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Hwang Duk Sung
Ito Hirokazu
Lepe Mark
Luz Lyndon
Nario Evelyn
Alpha Therapeutic Corporation
Mohamed Abdel A.
Tsang Cecilia J.
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