How big is his tag?
∼2.5 kDa
His-tags, due to their relatively small size (∼2.5 kDa), are not believed to significantly interfere with the function and structure of a majority of proteins.
How big is a flag tag?
about 1 kDa
FLAG is a short, 8 amino acid sequence DYKDDDDK about 1 kDa in size (D = aspartic acid, Y = tyrosine, K = lysine). Due to its small size, some researchers may choose to leave the tag intact, but cleavage can be performed with enterokinase.
What is a tag in molecular biology?
From Wikipedia, the free encyclopedia. Protein tags are peptide sequences genetically grafted onto a recombinant protein. Often these tags are removable by chemical agents or by enzymatic means, such as proteolysis or intein splicing. Tags are attached to proteins for various purposes.
What is purification tag?
Protein tags are most frequently used to purify proteins for which no protein-specific antibody exists. Such tags include his (polyhistidine), FLAG (DYKDDDDK), GST, and Myc tags, which are fused to proteins of interest using expression vector systems.
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. It is used extensively as a general epitope tag in expression vectors (2, 3).
How does 6 His tag work?
How Does His-Tag Purification Work? His-tag purification uses the purification technique of immobilized metal affinity chromatography, or IMAC. In this technique, transition metal ions are immobilized on a resin matrix using a chelating agent such as iminodiacetic acid.
What is a flag HA tag?
The FLAG® HA tandem epitope system consists of small epitopes tags that are not eukaryotic derived. These features minimize interference with protein functions and provide superior specificity.
How does HA tag work?
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.
How many kDa is an HA tag?
What does an HA tag do?
What is 6x His-tag?
The 6xHis tag, also known as polyhistidine tag, His6 tag and/or hexa histidine tag, is an amino acid motif consisting of at least 6 histidine residues fused to the carboxyl (C-) or amino (N-) terminus of a target protein in transfected cells.