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Purification of aromatic L-amino acid decarboxylase from bovine brain with a monoclonal antibody

Authors :
K Tamai
T Nagatsu
Hiroshi Ichinose
Ikuo Nishigaki
Source :
Scopus-Elsevier

Abstract

Aromatic L-amino acid decarboxylase was purified from bovine brain for the first time by affinity chromatography using a monoclonal antibody to the enzyme, and it was compared with the decarboxylase purified from bovine adrenal medulla by the same procedure. The monoclonal antibody was produced from a hybridoma established for the enzyme highly purified from bovine adrenal medulla. The Mr values of brain and adrenal-medulla enzyme were both estimated to be approx. 100,000 by gel-permeation chromatography. SDS/polyacrylamide-gel electrophoresis revealed a single band with an apparent Mr of 50,000. Western immunoblot analysis showed that the antibody recognized each enzyme. With regard to substrate specificity, pH-dependence and effect of pyridoxal 5′-phosphate as a cofactor, both enzymes were similar.

Details

Database :
OpenAIRE
Journal :
Scopus-Elsevier
Accession number :
edsair.doi.dedup.....c5282ad7ee7f462f7e7f4ab72dd8dd3e