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pET21a-Core Traptavidin
(Plasmid #26054)


Full plasmid sequence is not available for this item.


Item Catalog # Description Quantity Price (USD)
Plasmid 26054 Standard format: Plasmid sent in bacteria as agar stab 1 $85

This material is available to academics and nonprofits only.


  • Vector backbone
  • Backbone manufacturer
    EMD Biosciences
  • Backbone size w/o insert (bp) 5443
  • Vector type
    Bacterial Expression

Growth in Bacteria

  • Bacterial Resistance(s)
    Ampicillin, 100 μg/mL
  • Growth Temperature
  • Growth Strain(s)
  • Copy number
    High Copy


  • Gene/Insert name
    Core Traptavidin
  • Alt name
  • Species
    Streptomyces avidinii
  • Insert Size (bp)
  • Mutation
    Streptavidin with 2 amino acid mutations: S52G R53D. No His tag.
  • GenBank ID

Cloning Information

  • Cloning method Restriction Enzyme
  • 5′ cloning site NdeI (not destroyed)
  • 3′ cloning site HindIII (not destroyed)
  • 5′ sequencing primer T7F
  • 3′ sequencing primer T7R
  • (Common Sequencing Primers)

Resource Information

Terms and Licenses

  • Academic/Nonprofit Terms
  • Industry Terms
    • Not Available to Industry
  • Zeocin® is an InvivoGen trademark.

Depositor Comments

Traptavidin has a lower off-rate and lower on-rate for biotin conjugates, as well as higher mechanical strength and higher thermal stability. It is a tetramer, refolded from inclusion bodies. This plasmid encodes 'core' traptavidin, which does not contain a His tag.

How to cite this plasmid ( Back to top)

These plasmids were created by your colleagues. Please acknowledge the Principal Investigator, cite the article in which the plasmids were described, and include Addgene in the Materials and Methods of your future publications.

  • For your Materials & Methods section:

    pET21a-Core Traptavidin was a gift from Mark Howarth (Addgene plasmid # 26054 ; ; RRID:Addgene_26054)
  • For your References section:

    A streptavidin variant with slower biotin dissociation and increased mechanostability. Chivers CE, Crozat E, Chu C, Moy VT, Sherratt DJ, Howarth M. Nat Methods. 2010 Apr 11. ():. 10.1038/nmeth.1450 PubMed 20383133