Aromatic amino acid transaminase in rat intestine.

نویسندگان

  • J Nakamura
  • T Noguchi
  • R Kido
چکیده

The transamination of aromatic l-amino acids (5-hydroxytryptophan, tryptophan, tyrosine, phenylalanine and kynurenine) was shown to be catalysed by enzyme preparations from rat small intestine. On the basis of the partial purification and characterization of these aromatic amino acid transaminases, it is suggested that rat small intestine contains several kinds of aromatic amino acid transaminases.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Purification and properties of halogenated tyrosine and thyroid hormone transaminase from rat kidney mitochondria.

Halogenated tyrosine transaminase has been purified 30-fold from a sonic extract of rat kidney mitochondria. Purification involves ammonium sulfate fractionation and chromatography on diethylaminoethyl cellulose and hydroxylapatite. The purified enzyme is highly specific for tyrosine analogues with halogen substituents in positions 3 or 3 and 5, for thyroid hormones, and, to a lesser extent, fo...

متن کامل

Protective role of ferulic acid against the damaging effect induced by electromagnetic waves on rat liver and intestine tissues

Background: the increasing use of mobile phones in daily life causes many concerns about their effects on human health. Therefore, this work was designed to study the effects of exposure to 1800 MHz electromagnetic waves (EMW) on the liver and intestine of male albino rats and the protective role of ferulic acid (FA) against these harmful effects. Materials and Methods: twenty-four male albino ...

متن کامل

Aspartate: 2-oxoglutarate aminotransferase from trichomonas vaginalis. Identity of aspartate aminotransferase and aromatic amino acid aminotransferase.

Aspartate: 2-oxoglutarate aminotransferase from the anaerobic protozoon Trichomonas vaginalis was purified to homogeneity and characterized. It is a dimeric protein of overall Mr approx. 100000. Only a single isoenzyme was found in T. vaginalis. The overall molecular and catalytic properties have features in common with both the vertebrate cytoplasmic and mitochondrial isoenzymes. The purified ...

متن کامل

Evidence of phenylalanine transaminase activity in the isoenzymes of aspartate transaminase.

The transamination by pig mitochondrial and supernatant aspartate transaminase of aromatic amino acids was studied in order to determine if an analogy exists between these enzymes and a previously reported brain phenylalanine transaminase (GEORGE, H., AND GABAY, S. (1968) Biochim. Biophys. Ada, 167, 555). Supernatant and mitochondrial aspartate transaminase from pig heart can utilize aromatic a...

متن کامل

The assay of aromatic amino acid transaminations and keto acid oxidation by the enol borate-tautomerase method.

The enol tautomers of the aromatic oc-keto acids combine instantaneously and reversibly with borate to form complexes of a mixed ester-anhydride structure, thereby displacing the apparent keto-enol equilibrium in favor of the enol tautomer. The enol tautomer and its borate complex have strong absorption in the 300 ml* region (1). This strong absorption is the basis of the spectrophotometric met...

متن کامل

ذخیره در منابع من

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The Biochemical journal

دوره 135 4  شماره 

صفحات  -

تاریخ انتشار 1973