Condensation reaction between angiotensin II and dicarboxylic acid in water at high temperature without any catalytic agent additive.
The condensation reaction of angiotensin II and tartaric acid in water at 100-140 degrees 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.
Asano
Takamitsu
T
Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
Maeda
Atsushi
A
Kimura
Yukitaka
Y
Takahashi
Taro
T
Nakamura
Akihiro
A
Maeda
Hirokazu
H
Adachi
Shuji
S
D000804:Angiotensin II / Q000737:chemistry*; D002384:Catalysis; D002851:Chromatography, High Pressure Liquid; D003998:Dicarboxylic Acids / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008293:Malates / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods; D013386:Succinates / Q000737:chemistry; D013644:Tartrates / Q000737:chemistry; D013696:Temperature; D014867:Water
D003998:Dicarboxylic Acids; D008293:Malates; D013386:Succinates; D013644:Tartrates; D014867:Water; D000804:Angiotensin II; C030298:malic acid; C029768:tartaric acid