FIELD: biotechnology.
SUBSTANCE: invention relates to a composition containing a highly concentrated inhibitor of alpha-1 proteinase (A1PI), and a method of its preparation. The method involves the use of single-pass filtration in a tangential flow.
EFFECT: invention is effective for the treatment of conditions associated with the treatment of diseases associated with deficiency of A1PI, or diseases in which it is beneficial to increase the level of A1PI.
4 cl, 2 dwg, 6 tbl, 5 ex
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