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pComb8 vector

For research use only. Not intended for any clinical use.
Cat.No.
VPT4011
Description
VPT4011 is nearly identical with pComb3 but contains the phage pVIII fusion protein for multi-valent expression along the sides of the phage via fusion with pVIII.
Promoter
LacZ
Resistance
Amp
Selection
Ampicillin
Vector Length
3350 bp
Vector Type
Phagemid vector
Vector Map

Background

Applications

Publications

Q & A

Customer Reviews

The pComb8 vector, a phagemid, shares many similarities with pComb3, with the primary difference being that the geneIII sequence in pComb3 is replaced with the geneVIII sequence in pComb8. To produce phages containing pComb8, the presence of helper phages such as VCSM13 is necessary. For Fab display, cloning of the heavy chain sequence into the XhoI/SpeI restriction sites and the light chain into the SacI/XbaI restriction sites is a process that pComb8 shares with pComb3. The use of ProteinVIII, which is naturally multi-copied, means that pComb8 display is multi-valent, thereby providing an advantage over pComb3 systems. Notably, pComb8 can also be used to display other proteins of interest.
The pComb8 is a phage display plasmid that is commonly used in molecular biology. This vector provides a robust platform for the presentation of large libraries of peptides, proteins, or even whole antibodies on the surface of bacteriophages. Firstly, the pComb8 vector has become an invaluable tool in the research of protein-protein interactions. It provides a means for identifying interaction partners by screening the phage display libraries. The unique feature of the pComb8 vector is that it pinpoints the actual binding site on the target molecule which is crucial for understanding the mechanics of interactions, especially in protein-ligand and protein-protein engagements. Secondly, pComb8 vector plays a significant role in the discovery and development of therapeutic antibodies. Since phage display technology can mimic the immune system in vitro, it can be used to generate human antibodies. The pComb8 vector acts as a vehicle to express an enormous diversity of antibody fragments (such as scFv or Fab) on the phage surface, enabling the identification and selection of desired antibodies. Therefore, the pComb8 vector has been widely employed to screen high-affinity antibodies, especially against disease-related proteins. Apart from that, pComb8 vector is critical in epitope mapping. Epitopes are regions of an antigen that are recognized by the immune system, specifically by antibodies. The pComb8 vector aids in screening peptide or protein libraries to identify these epitopes, providing insight into antigenic characteristics and improving vaccine design.
Customer Q&As
What is the difference between pComb8 and pComb3 plasmid?

A: As a phagemid, pComb8 is similar to pComb3 except that the geneIII sequence is replaced by the geneVIII sequence.

Does production of pComb8 phage require helper phage?

A: Yes. Production of phages containing pComb8 needs the presence of helper phages, such as VCSM13.

What are the advantages of pComb8 vector?

A: ProteinVIII is naturally multi-copy, so the pComb8 display is multivalent compared to the pCOMB3 system.

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Customer Reviews
Very efficient

The pComb8 phage display vector was very efficient and reliable during our lab experiments. Its high diversity in library construction and superior performance in amplifying target sequences allowed us to achieve our desired outcomes more reliably and accurately.

Germany

03/18/2023

Perfect tool

pComb8 vector's ability to display a plethora of peptide sequences has allowed me to conduct a range of investigations on protein-protein interactions.

United States

11/14/2023

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