PH1755 | Tris-硼酸电泳缓冲液（10×TBE Buffer）

货号 PH1755

名称 Tris-硼酸电泳缓冲液（10×TBE）TBE Buffer,10×

规格 500ml

存储 Store at RT ,12个月有效。
 
产品简介 

TBE 缓冲液是生物学中常使用的核酸电泳缓冲盐溶液，主要用于DNA的琼脂糖凝胶电泳。TBE的主要成分是Tris-硼酸盐与EDTA，缓冲能力强，适合较长时间电泳，分辨率较高，电泳小于1kb的片段时分离效果好。TBE 缓冲液中的硼酸成分会影响DNA回收效率以及后续的酶反应，若要进行DNA片段的琼脂糖凝胶电泳回收实验，建议使用TAE 缓冲液。

About TBE Buffer

Tris buffers are used under slightly basic pH conditions, as for DNA electrophoresis, because this keeps the DNA soluble in the solution and deprotonated so it will be attracted to the positive electrode and will migrate through a gel. EDTA is an ingredient in the solution because this common chelating agent protects nucleic acids from degradation by enzymes. The EDTA chelates divalent cations that are cofactors for nucleases that may contaminate the sample. However, since the magnesium cation is a cofactor for DNA polymerase and restriction enzymes, the concentration of EDTA is kept purposely low (aroun 1 mM concentration).

Although TBE and TAE are common electrophoresis buffers, there are other options for low-molarity conductive solutions, including lithium borate buffer and sodium borate buffer. The problem with TBE and TAE is that Tris-based buffers limit the electric field that can be used in electrophoresis because too much charge causes a runaway temperature.