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Condensation Reaction between Angiotensin II and Dicarboxylic Acid in Water at High Temperature without Any Catalytic Agent Additive
Author(s) -
Asano Takamitsu,
Maeda Atsushi,
Kimura Yukitaka,
Takahashi Taro,
Nakamura Akihiro,
Maeda Hirokazu,
Adachi Shuji
Publication year - 2008
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1021/bp050058n
Subject(s) - catalysis , condensation , chemistry , angiotensin ii , organic chemistry , biochemistry , receptor , thermodynamics , physics
The condensation reaction of angiotensin II and tartaric acid in water at 100–140 °C proceeded without any added catalytic agent. One of the products, N ‐CO‐tartarylangiotensin II, was confirmed by LC‐MS, positive‐ion MALDI‐MS, and the fluorescamine method as a condensation product. The initial concentration of the substrates, temperatures, and initial pH affected the yield of the product. The higher concentrations and temperatures increased the concentration of the condensation product. The optimal pH for the condensation reaction was 3.0. The other C4 saturated dicarboxylic acids, malic and succinic acids, were also condensed by angiotensin II.