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SAMPLE COLLECTION AND STORAGE

Tissue homogenates - The preparation of tissue homogenates will vary depending upon tissue type. For this assay, tissues were rinsed in ice-cold PBS(0.01mol/L,pH 7.0-7.2) to remove excess blood thoroughly and weighed before homogenization. Minced the tissues to small pieces and homogenized them in 5-10 mL of PBS with a glass homogenizer on ice(Micro Tissue Grinders woks, too). The resulting suspension was sonicated with an ultrasonic cell disrupter or subjected to two freeze-thaw cycles to further break the cell membranes. After that, the homogenates were centrifugated for 5 minutes at 5000×g. Remove the supernate and assay immediately or aliquot and store at ≤-20^oC.

 組織勻漿：

1） 取適量組織塊，于預冷PBS（0.01mol/L, pH 7.0-7.2）中清洗去除血液，稱重后備用（組織塊較大需先剪碎后再勻漿）；

2） 可同時選用多種勻漿方法達到較好的破碎效果：首先將組織塊移入玻璃勻漿器，加入5-10mL預冷PBS進行充分研磨，該過程需在冰上進行（有條件實驗室可選用機器勻漿）；得到的勻漿液可再利用超聲破碎或反復凍融進一步處理（超聲破碎過程中注意冰浴降溫；反復凍融法可重復2次）。

3） 將制備好的勻漿液于5000×g離心5分鐘，留取上清即可檢測。