How many kDa is a His-tag?
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.
What is his-tag antibody?
His-tag antibodies provide a dependable method for the detection and purification of tagged target proteins without a protein-specific antibody or probe. Our His-tag antibodies also come with the option of being HRP, biotin, or fluorophore conjugated to meet all your research needs.
What is his-tag sequence?
Features of the His-tag: Amino Acid Sequence. HHHHHH (4-10) DNA Sequence. 5′-CAT CAC CAT CAC CAT CAC-3′
How do I get rid of his-tag?
His-tag removal from protein using TEV Protease
- Dialyze the protein against 20 mM Tris-HCl, pH 7.5.
- Determine the protein concentration.
- Combine 15 μg of protein and H2O (if necessary) to make a 45 μl total reaction volume.
- Add 5 μl of TEV Protease Reaction Buffer (10X) to make a 50 μl total reaction volume.
What is the weight of a His-tag?
0.2–1.6 kDa
His-tags. Molecular Weight: 0.2–1.6 kDa.
What is an N terminal His-tag?
A polyhistidine-tag is an amino acid motif in proteins that typically consists of at least six histidine (His) residues, often at the N- or C-terminus of the protein.
How do you check his tags?
Detecting His-tagged Fusion Proteins on a Blot Stain the nitrocellulose membrane with 20 ml of ready-to-use InVision™ His-tag In-gel Stain for 20 minutes at room temperature. Rinse the membrane briefly with deionized water. Place the wet or dry membrane on a UV transilluminator equipped with a camera.
Is histidine an amino acid?
Histidine is an amino acid. Amino acids are the building blocks of protein in our bodies. People use histidine as medicine.
What do his tags do?
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 His-tag and what is it used for?
One of the most commonly used tags is the polyhistidine tag, also known as His-Tag, which is a string of usually between six and nine histidine residues (see Figure 1 below). This method of tagging is especially useful as it allows for easy purification and detection of the recombinant protein.
How histidine tag is removed?
The tag may be removed by cleavage of a protease site placed between the target protein and the affinity tag, followed by a step to separate the protein and affinity tag.
How do you get rid of thrombin after cleavage?
The thrombin or Factor Xa can be removed from the protein of interest in one step using a HiTrap Benzamidine FF (high sub) column in series after the GSTrap column. In this process, the cleaved, tagged protein and thrombin or Factor Xa is washed from the GSTrap column onto the HiTrap Benzamidine FF (high sub) column.