Structural Identification of the Degradation Products of the Antitumor Peptide Antagonist [Arg6,D-Trp7,9,MePhe8]Substance P (6-11)
作者:J. Leon E. Reubsaet、Jos H. Beijnen、Auke. Bult、Ed. Hop、Raymond. Vermaas、Yunus. Kellekule、J. Jantien. Kettenes-van den Bosch、Willy J. M. Underberg
DOI:10.1021/ac00119a036
日期:1995.12.1
liquid chromatography/mass spectrometry, fast atom bombardment tandem mass spectrometry, optical rotation analysis, and chiral gas chromatography. The product formed in acidic solution is the terminally deamidated antagonist [Arg6,D-Trp7,9,MePhe8]substance P (6-11); this product was also found in alkaline degradation mixtures. Other important degradation products originate from racemization of the amino
碱性六肽拮抗剂[Arg6,D-Trp7,9,MePhe8]-物质P(6-11)在酸性和碱性介质中降解。在酸性溶液中,仅发现一种降解产物,而在碱性溶液中,至少形成了六种产物。通过反相高效液相色谱,毛细管电泳,液相色谱/质谱,快速原子轰击串联质谱,旋光分析和手性气相色谱对这些化合物进行分析表征和结构鉴定。在酸性溶液中形成的产物是末端脱酰胺基拮抗剂[Arg6,D-Trp7,9,MePhe8]物质P(6-11);在碱性降解混合物中也发现了该产物。其他重要的降解产物来自氨基酸残基L-Met的外消旋化,鸟氨酸从鸟氨酸的形成,