Abstract

1. 1. Hemin-induced lysis of rat erythrocytes is markedly reduced by ceruloplamin (human) and serum albumins from different species, the order of effectiveness beings: bovine albumin ≅ ceruloplasmin > human albumin ≅ dog albumin > apotransferrin (human). 2. 2. Although the proteins studied had hemin binding capacity, the best protective agents, ceruloplasmin and bovine albumin, did bind hemin less strongly than human and dog albumin. 3. 3. The results suggest the existence of another protective mechanism, possibly involving an interaction between erythrocyte membranes and serum proteins.

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