FIELD: biochemistry.
SUBSTANCE: invention relates to biochemistry. Purposed a fraction of DNA-hydrolyse secretory immunoglobulins of class A (sIgA), having molecular weight 380 kDa, processing selective apoptotic activity in relation to human cancer cells, extracted from milk of healthy donors by affinity chromatography on protein-A-sepharose, then ion-exchange chromatography on DEAE-cellulose, then by affinity chromatography on DNA-cellulose.
EFFECT: invention enables to inhibit cancer cell growth on the way of apoptosis without inducing death of normal (non-tumorous) cells.
1 cl, 7 dwg, 1 tbl, 3 ex
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