What does an HA tag do?

What does an HA tag do?

The HA (hemagglutinin) tag is derived from the human influenza virus HA protein. It is well characterized and is used extensively as a general antibody epitope tag. HA tag antibodies provide a dependable method for the detection and purification of tagged target proteins without a protein-specific antibody or probe.

What is Flag ha?

The FLAG® HA tandem epitope system consists of small epitopes tags that are not eukaryotic derived. The hydrophilic character of the FLAG® HA peptide increases the likelihood that the dual epitope will be located on the surface of the fusion protein where it is accessible for the antibody-antigen interaction.

How do you elute a HA tag?

The HA-tagged protein binds to the HA-tag specific monoclonal antibody conjugated on an agarose gel. After washing away residual impurities, bound HA-tag proteins can be eluted off the affnity column by high concentration of the HA-tag peptide or by low pH buffer.

Why is it called flag tag?

The Flag® tag, also known as the DYKDDDDK-tag, is a popular protein tag that is commonly used in affinity chromatography and protein research for over 20 years now (6,7,8,9,10,11). As its second name suggests the tag consists of an amino acid sequence DYKDDDDK. (D=Aspartic acid; K=Lysine; Y=Tyrosine).

What is 3xha tag?

An HA-tag is derived from the human influenza hemagglutinin (HA) molecule corresponding to amino acids 98-106. It has been extensively used as a general epitope tag in expression vectors. The HA-tag does not appear to interfere with the bioactivity or the biodistribution of the recombinant HA-tagged protein.

How do you purify HA tagged protein?

How do you purify HA-tagged proteins? HA-tagged recombinant protein can be affinity purified directly from a cell culture lysate or supernatant. The HA-tagged protein binds to the HA-tag specific monoclonal antibody conjugated on an agarose gel.

What is the molecular weight of HA tag?

1.1 kDa
The HA tag (YPYDVPDYA-tag) itself has a molecular weight of 1.1 kDa and is a linear epitope derived from amino acids 98-106 of the HA protein.

What is a 3X FLAG tag?

General description. The 3X FLAG Peptide is a synthetic peptide of 23 amino acid residue. The Asp-Tyr-Lys-Xaa-Xaa-Asp motif is repeated three times in the peptide. Eight amino acids at the C-terminus make up the classic FLAG sequence (Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys).