아스코르베이트옥시데이트

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Warning

• 유해·위험 문구

  H315：피부에 자극을 일으킴

  H319：눈에 심한 자극을 일으킴

  H335：호흡 자극성을 일으킬 수 있음

• 예방조치문구

  P302+P352：피부에 묻으면 다량의 물로 씻으시오.

  P305+P351+P338：눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.

아스코르베이트옥시데이트 화학적 특성, 용도, 생산

• 화학적 성질

  Appearance : Light blue amorphous powder, lyophilized
  Stability : Store at －20℃ (A decrease in activity of ca.20% may occur at 5℃ within 6 months.)
  Molecular weight : 132,000, 140,000
  Isoelectric point : between 6.0 and 7.8 , 8.2
  Michaelis constant : 2.5×10－4M (Ascorbate)
  Structure : 8 copper atoms per mol of enzyme
  Inhibitors : cyanide, Na2S, diethyldithiocarbamate (Na)
  Optimum pH : 5.6
  Optimum temperature : approx. 30℃
  pH Stability : pH 7.0－10.0 (25℃, 17hr)
  Thermal stability : below 40℃ (pH 8.0, 30min)
  Substrate specificity : This enzyme oxidizes ascorbic acid and several ascorbic derivatives.

• 용도

  Ascorbate oxidase, from Cucurbita sp., may be used to study oxidative stress and heat stress response and tolerance. Also used in ascorbic acid assays to study the heat stress response of Arabidopsis and useful for enzymatic determination of ascorbic acid and for eliminating the interference of ascorbic acid in clinical analysis.

• 정의

  An enzyme found in plant tissue that acts upon ascorbic acid in the presence of oxygen to produce dehydroascorbic acid.

• 일반 설명

  Ascorbate oxidase is a homodimeric enzyme, which comprises 552 amino acid residues per subunit (zucchini). It corresponds to a molecular mass of 70kDa per subunit. This enzyme is mainly found in plants, fungi and eubacteria.

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