Abbasi A, Zaidi Z H
HEJ Research Institute of Chemistry, University of Karachi, Pakistan.
J Protein Chem. 1991 Apr;10(2):139-44. doi: 10.1007/BF01024776.
The complete amino acid sequence of the alpha A-chain of major hemoglobin component from Cuckoo (Eudynamys scolopaceae) is presented. Separation of the polypeptide subunits was achieved by ion exchange chromatography in the presence of 8 M urea. The sequence was studied by automatic Edman degradation of the native chain and its tryptic fragments in a gas-phase sequencer. Comparison with other avian hemoglobins shows residues alpha 21, alpha 30, alpha 96, alpha 110, and alpha 114 as being specific to Cuckoo. The functional significance of these is discussed.
本文给出了杜鹃(褐翅鸦鹃)主要血红蛋白成分αA链的完整氨基酸序列。在8M尿素存在的情况下,通过离子交换色谱法实现了多肽亚基的分离。通过在气相测序仪中对天然链及其胰蛋白酶片段进行自动埃德曼降解来研究序列。与其他鸟类血红蛋白的比较表明,α21、α30、α96、α110和α114位残基是杜鹃所特有的。文中讨论了这些残基的功能意义。