WANG Jun,QIU Rong-ying,CHENG Xiang-xu,et al.The Preparation and Mass Spectrometry Analysis of Somatostatin Trisulfide[J].Journal of Instrumental Analysis,2023,42(09):1134-1140.
WANG Jun,QIU Rong-ying,CHENG Xiang-xu,et al.The Preparation and Mass Spectrometry Analysis of Somatostatin Trisulfide[J].Journal of Instrumental Analysis,2023,42(09):1134-1140. DOI: 10.19969/j.fxcsxb.23052001.
The Preparation and Mass Spectrometry Analysis of Somatostatin Trisulfide
In this study,somatostatin trisulfide was generated by the reaction of somatostatin with sodium thiosulfate(Na,2,S,2,O,3,),and then freeze-dried after purified by high pressure preparation liquid chromatography. The exact mass,peptide sequence and trisulfide bond assignment were detected by high resolution mass spectrum. The results showed that somatostatin trisulfide was generated by reaction of somatostatin with Na,2,S,2,O,3, when the molar ratio was 1∶2,and reacted in a 60 ℃ water bath for 1 h. The purity of somatostatin trisulfide was greater than 95% after purified,desalinated and freeze-dried. It was analyzed by mass spectrometry. The ,m,/,z, of[M+2H],2+, was 835.353 9 and[M+3H],3+ ,was 557.236 9,the peptide sequence was A-G-C-K-N-F-F-W-K-T-F-T-S-C,and the trisulfide bond was Cys(3)-Cys(14),which were consistent with theoretical structure of somatostatin trisulfide. The research provided a basis for quality research of somatostatin.
关键词
生长抑素三硫化物高压制备液相色谱纯化质谱分析质量研究
Keywords
somatostatin trisulfidehigh pressure preparation liquid chromatographypurificationmass spectrometry analysisquality research
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