Báo cáo khoa học: Oxygen binding and its allosteric control in hemoglobin of the primitive branchiopod crustacean Triops cancriformis
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Branchiopod crustaceans are endowed with extracellular, high-molecular-mass hemoglobins (Hbs), the functional and allosteric properties of which have largely remained obscure. The Hb of the phylogenetically ancientTri-ops cancriformis(Notostraca) revealed moderate oxygen affinity, coopera-tivity and pH dependence (Bohr effect) coefficients: P50¼13.3 mmHg, n50¼2.3, andu¼)0.18, at 20C and pH 7.44 in Tris buffer. Thein vivo hemolymph pH was 7.52.
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