title: Binding of human carbonic anhydrase to human hemoglobin.
abstract: The ability of human carbonic anhydrases to interact with human CO-hemoglobin have been studied with the counter-current distribution technique in aqueous/aqueous biphasic systems. The experimental results show that human carbonic anhydrase II interacts with human CO-hemoglobin whereas human carbonic anhydrase I does not. THe interaction between CO-hemoglobin and carbonic anhydrase II was quantified using the theoretical model developed previously for one-to-one interacting systems. [Backman, L. and Shanbhag, V.P. (1979) J. Chromatogr. 171, 1-13]. The apparent association constant was estimated to be 4.1 x 10(5) l mol-1 at pH 8.0 and 21 degrees C for the association of carbonic anhydrase II and CO-hemoglobin.
mesh_terms: D002256:Carbonic Anhydrases / Q000097:blood*; D002263:Carboxyhemoglobin / Q000378:metabolism*; D003377:Countercurrent Distribution; D004912:Erythrocytes / Q000378:metabolism; D006454:Hemoglobins / Q000378:metabolism*; D006801:Humans; D066298:In Vitro Techniques; D007700:Kinetics; D008956:Models, Chemical; D011522:Protons
chemical_list: D006454:Hemoglobins; D011522:Protons; D002263:Carboxyhemoglobin; D002256:Carbonic Anhydrases