title: Primary structure of the hemoglobin beta-chain of rose-ringed parakeet (Psittacula krameri).
abstract: The primary structure of Rose-ringed Parakeet hemoglobin beta-chain was established, completing the analysis of this hemoglobin. Comparison with other avian beta-chains show variations smaller than those for the corresponding alpha-chains. There are 11 amino acid exchanges in relationship to the only other characterized psittaciform beta-chain, and a total of 35 positions are affected by differences among all avian beta-chains analyzed (versus 61 for the alpha-chains). At three positions, the Psittacula beta-chain has residues unique to this species. Three alpha 1 beta 1 contacts are modified, by substitutions at positions beta 51, beta 116, and beta 125.
authors: Department of Chemistry I, Karolinska Institutet, Stockholm, Sweden.
authors: A
authors: A
authors: Islam
authors: B
authors: B
authors: Persson
authors: Z H
authors: ZH
authors: Zaidi
authors: H
authors: H
authors: Jörnvall
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D006454:Hemoglobins / Q000032:analysis* / Q000302:isolation & purification; D008969:Molecular Sequence Data; D010240:Parakeets / Q000097:blood*; D011563:Psittaciformes / Q000097:blood*; D013045:Species Specificity
chemical_list: D006454:Hemoglobins