Isolation and NH2-terminal sequence of a novel porcine anterior pituitary polypeptide. Homology to proinsulin, secretin and Rous sarcoma virus transforming protein TVFV60.
[No authors listed]
摘要
An Mr 21 000 polypeptide, designated APPG, has been purified by reverse-phase, high-performance liquid chromatography (RP-HPLC), from acid extracts of porcine anterior pituitary glands. This acidic protein possesses an isoelectric point of 4.9. Amino acid analysis shows that it is not a glycoprotein and estimates it to contain about 173 amino acids. NH2-terminal sequence analysis allowed the determination of the first 50 residues unambiguously. A computer data bank search using a mutation data matrix and comparison with 269 012 protein segments indicated that this is a novel polypeptide sequence. However, this search revealed suggestive sequence homologies to a number of peptides of known sequence, including duck proinsulin (30%), Rous sarcoma virus transforming protein TVFV60 (24%) and pig secretin (26%).
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基因功能
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原始数据
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文献解读
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