如何減少DNA條帶的拖尾？How to minimize DNA degradation?

A) 可能是DNA提取過程中混合太劇烈；B) 跑膠液用的次數(shù)太多; C) 材料本身多糖太多影響DNA酶抑制劑的作用; DNA 保存不當(dāng)。

A) Mixing too vigorously during the DNA isolation; B) Electrophoresis buffer too old; C) Staring bio-sample contained high amount polysaccharides; D) DNA sample was not stored properly.