Method of preparing alpha-1-proteinase inhibitor

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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424101, C07G 700

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043790879

ABSTRACT:
A method is disclosed for separating alpha-1-proteinase inhibitor from a blood plasma fraction particularly from the Cohn fractionation scheme. An aqueous solution of the blood plasma fraction is held at a pH of about 6.5-8.5, and a temperature of about 2.degree.-50.degree. C. for a period of about 0.2-24 hours and then mixed with a poly-condensed polyglycol in a proportion of about 10-15 parts of polymer per 100 ml of aqueous solution containing the blood plasma fraction. The mixture may be held at a temperature of about 2.degree.-10.degree. C. for a period of about 1-24 hours. Next, the pH of the mixture is adjusted to about 4.6-5.7, to selectively precipitate unwanted proteins from the solution of alpha-1-proteinase inhibitor which is separated from the solution and purified further.

REFERENCES:
patent: 3415804 (1968-12-01), Polson
Biochemistry, vol. 13, pp. 5439-5445, Pannell et al., (1974).
Biochem. J., vol. 157, pp. 339-351 (1976), Saklatvala et al.
Biochemistry, vol. 15, pp. 798-804 (1976), Musiani et al.
Preparative Biochemistry, vol. 3, No. 6, pp. 541-552 (1973), Kress et al.
Preparative Biochemistry, vol. 5, No. 4, pp. 333-348 (1975), Glaser et al.

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