Primary structure of the hemoglobin beta-chain of rose-ringed parakeet (Psittacula krameri) |
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Authors: | Alia Islam Bengt Persson Zafar H Zaidi and Hans Jörnvall |
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Institution: | (1) Department of Chemistry I, Karolinska Institutet, S-104 01 Stockholm, Sweden;(2) HEJ Research Institute of Chemistry, University of Karachi, Karachi 32, Pakistan |
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Abstract: | The primary structure of Rose-ringed Parakeet hemoglobin -chain was established, completing the analysis of this hemoglobin. Comparisons with other avian -chains show variations smaller than those for the corresponding -chains. There are 11 amino acid exchanges in relationship to the only other characterized psittaciform -chain, and a total of 35 positions are affected by differences among all avian -chains analyzed (versus 61 for the -chains). At three positions, the Psittacula -chain has residues unique to this species. Three 11 contacts are modified, by substitutions at positions 51, 116, and 125. |
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Keywords: | -chain" target="_blank">gif" alt="beta" align="MIDDLE" BORDER="0">-chain hemoglobin rose-ringed parakeet structure |
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