
WB

N/A

N/A

IgG

PBS, pH 7.4, containing 0.02% sodium azide as Preservative and 50% Glycerol. Store at -20°C.
Do not aliquot the antibody.

WB: 1:5,000

The Flag tag antibody can recognize C-terminal, internal, and N-terminal Flag-tag fusion proteins.

The DYKDDDDK peptide (Flag-tag) is a small component of an epitope which does not appear to interfere with thebioactivity
or the biodistribution of the recombinant protein. It has been used extensively as a general epitope tag in expressionvectors.
It can be used for affinity chromatography, then used to separate recombinant, overexpressed protein from wild-type
proteinex pressed by the host organism. It can also be used in the isolation of protein complexes with multiple subunits.A
Flag-tag can beused in many different assays that require recognition by an antibody. If there is no antibody against the
studied protein, adding a Flag-tag to this protein allows one to follow the protein with an antibody against the Flag sequence
1.Xia Li, Xiaoliu Wang,Screening the receptors for Mycoplasma penetrans P35 lipoprotein and characterization of its functional binding domains,Frontiers in Cellular and Infection Microbiology,2025.(IF 4.8)
答:可能的原因有:
1、目的蛋白有多个修饰位点,本身可以呈现多条带,建议查阅文献或进行生物信息学分析,获得蛋白序列的修饰位点信息,通过去修饰确定蛋白实际大小;
2、样本处理过程中目的蛋白发生降解,建议加入蛋白酶抑制剂;样本处理时在冰上操作;
3、杂蛋白多,建议处理目的蛋白;
4、抗体特异性不强,建议使用特异性强的抗体;
5、抗体孵育时间过久,建议减少抗体孵育时间;
6、二抗与抗原有交叉反应,建议选择合适的封闭物;
7、二聚体或多聚体存在,建议增加蛋白质变性过程及强度;
8、底物显色与曝光时间过长,建议缩短显色及曝光的时间。
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