Pellegrini, Mariagiuseppina and Corda, Marcella and Manca, Laura and Olianas, Alessandra and Sanna, Maria Teresa and Fais, Antonella and Masala, Bruno Lucio (1997) The hemoglobin polymorphism of the Sardinian wild dwarf horse and the oxygen binding properties of the four different horse hemoglobins. The Italian Journal of Biochemistry, Vol. 46 (1), p. 7-14. ISSN 0021-2938. Article.
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A study was made of the Hb phenotype of the Sardinian dwarfhorse (Equus caballus jara), one of the last surviving wild horse species in Europe. Hb haplotypes and their frequencies were found to be similar to those described in the Arabian horse (BI = 0.551, BII = 0.389, A = 0.036, V = 0.015), which suggests possible introduction onto the island from North Africa. The oxygen binding properties of the whole hemolysates and of the four different horse Hbs, separated by ion-exchange chromatography, were considered with regard to the effect of chloride, 2,3-bisphosphoglycerate and lactate. Results indicate that no differences exist in the four components that characterize horse Hb. The molecular basis of the intrinsically low oxygen affinity and of the weak interaction of horse Hb with 2,3-bisphosphoglycerate is discussed in the light of the primary structure of the molecule.
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