|Datasheet||Specific References||Reviews||Related Products||Protocols|
|Vector Type||Mammalian Expression Vector|
|Expression Method||Constiutive, Stable / Transient|
|Selection In Mammalian Cells||Hygromycin|
FLAG-tag, or FLAG octapeptide, is a polypeptide protein tag that can be added to a protein using recombinant DNA technology. It can be used for affinity chromatography, then used to separate recombinant, overexpressed protein from wild-type protein expressed by the host organism. It can also be used in the isolation of protein complexes with multiple subunits.
A FLAG-tag can be used 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. Examples are cellular localization studies by immunofluorescence or detection by SDS PAGE protein electrophoresis.
The peptide sequence of the FLAG-tag from the N-terminus to the C-terminus is: DYKDDDDK (1012 Da). It can be used in conjunction with other affinity tags, for example a polyhistidine tag (His-tag), HA-tag or Myc-tag. It can be fused to the C-terminus or the N-terminus of a protein. Some commercially available antibodies (e.g., M1/4E11) recognize the epitope only when it is present at the N-terminus. However, other available antibodies (e.g., M2) are position-insensitive.
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, C-GFPSpark tag||CG90051-ACG|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, C-OFPSpark / RFP tag||CG90051-ACR|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, C-Flag tag||CG90051-CF|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, C-His tag||CG90051-CH|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, C-Myc tag||CG90051-CM|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, C-HA tag||CG90051-CY|
|Cynomolgus monkey CD19 Gene cDNA clone plasmid||CG90051-G|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, N-Flag tag||CG90051-NF|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, N-His tag||CG90051-NH|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, N-Myc tag||CG90051-NM|
|Cynomolgus monkey CD19 ORF mammalian expression plasmid, N-HA tag||CG90051-NY|
|Cynomolgus monkey CD19 natural ORF mammalian expression plasmid||CG90051-UT|
|Learn more about expression Vectors|
The cluster of differentiation (CD) system is commonly used as cell markers in immunophynotyping. Different kinds of cells in the immune system can be identified through the surface CD molecules which associating with the immune function of the cell. There are more than 320 CD unique clusters and subclusters have been identified. Some of the CD molecules serve as receptors or ligands important to the cell through initiating a signal cascade which then alter the behavior of the cell. Some CD proteins do not take part in cell signal process but have other functions such as cell adhesion. Cluster of differentiation 19 (CD19) is a member of CD system. CD19 is a cell surface molecule that assembles with the antigen receptor of B-cells. This results in a descent in threshold for antigen receptor-dependent stimulation. A simplified view holds that the ability of B-cells to respond to the various antigens in a specific and sensitive manner is achieved in the presence of low-affinity antigen receptors. CD19 primarily acts as a B-cell coreceptor in conjunction with CD21 and CD81. The formation of the receptor complex is induced by antigen and CD19, induced by exogenous antigen, has been found cytoplasmic tail phosphorylated and bind to sIg.