The metal requirement of rat tyrosine hydroxylase

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The effect of added metals on purified rat tyrosine hydroxylase which is predominantly iron-free has been determined. The presence of 10 μM ferrous ammonium sulfate results in a ten-fold increase in the activity of enzyme containing 0.1 iron atom per subunit. The enzyme activity is half-maximal at a free ferrous iron concentration of 0.15 μM. Copper, zinc, silver, and nickel are unable to replace ferrous iron. Ferric iron is inactive unless ascorbate is included to reduce it.

Original languageEnglish (US)
Pages (from-to)211-215
Number of pages5
JournalBiochemical and Biophysical Research Communications
Issue number1
Publication statusPublished - May 30 1989


ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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