pSecTag2 et pSecTag2/Hygro sont des vecteurs d’expression de mammifères conçus pour la sécrétion, la purification et la détection des protéinesAfficher plus
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Référence
Quantité
V90020
20 μg
Référence V90020
Prix (EUR)
1 246,00
20 µg
Ajouter au panier
Quantité:
20 μg
Prix (EUR)
1 246,00
20 µg
Ajouter au panier
pSecTag2 et pSecTag2/Hygro sont des vecteurs d’expression de mammifères conçus pour la sécrétion, la purification et la détection des protéines de fusion. Chaque vecteur possède un grand site de clonage multiple dans trois cadres de lecture pour simplifier le clonage dans le cadre avec le signal de sécrétion d’extrémité N-terminale. Les vecteurs (Figure 1) offrent les fonctionnalités suivantes :
• Signal de sécrétion de la région V-J2-C de la chaîne kappa de souris Ig pour une sécrétion efficace des protéines recombinantes (figure 2) • Activateur de cytomégalovirus (CMV) pour l’expression constitutive de haut niveau • Étiquette de polyhistidine (6xHis) pour la purification avec de la résine de chélation de nickel et détection avec un anticorps anti-His (C-terminal) • Épitope C-terminal c-myc pour une détection avec anticorps anti-myc • Signal de polyadénylation de l’hormone de croissance bovine (BGH) et séquence de terminaison de transcription pour une stabilité accrue de l’ARNm • Origine de SV40 pour la réplication épisomique et sauvetage de vecteur simple dans les lignées cellulaires exprimant l’antigène grand T (p. ex., COS-1, COS-7)
Les vecteurs pSecTag2 portent le gène de résistance à Zeocin™ pour une sélection rentable dans les cellules de mammifères. La sélection de Zeocin™ peut également être utilisée dans E. coli.
Les vecteurs pSecTag2 / Hygro possèdent le gène de résistance à l’hygromycine B pour la sélection de lignées cellulaires de mammifères stables.
Usage exclusivement réservé à la recherche. Ne pas utiliser pour des procédures de diagnostic.
Spécifications
Type de livraisonTransfection
À utiliser avec (application)Expression sécrétée
Type de produitVecteur d’expression de cellules de mammifères
Quantité20 μg
Agent de sélection (eucaryotique)Zéocine™
VecteurpSec
Méthode de clonageEnzyme de restriction / MCS
AccélérateurCMV
Marqueur de protéineÉtiquette His (6x), Étiquette épitope c-Myc, Séquence IgK leader
Unit Size20 µg
Contenu et stockage
20 µg de chaque vecteur et un contrôle d’expression PSA sont superenroulés et lyophilisés. Conserver à -20°C. La stabilité des vecteurs est garantie pendant 6 mois lorsqu’ils sont correctement conservés.
Foire aux questions (FAQ)
I used the pSecTag2 vector and am seeing cellular but not secreted expression of the protein of interest. Can you offer some tips?
If the gene of interest has a start codon in the context of a perfect Kozak sequence, it may be preferentially translated over the vector's initiation codon, resulting in no leader sequence and no glycosylation, and hence no targeting to the endoplasmic reticulum and no secretion. This is rare, but it has been observed. If it is a problem, we recommend using PCR to delete the start codon.
Can I propagate my pSecTag2 vector in E. coli containing the Tn5 gene?
pSectag2 vectors have the Zeocin antibiotic-resistance marker for selection in E. coli, and any E. coli strain that contains the complete Tn5 transposable element (i.e., DH5alphaF'IQ, SURE, SURE2) encodes the ble (bleomycin) resistance gene that confers resistance to the Zeocin antibiotic. Hence, for the most efficient selection, we highly recommend choosing an E. coli strain that does not contain the Tn5 gene.
I see that the pSectag2 vectors carry the Zeocin antibiotic-resistance gene driven by the EM7 promoter. Can I use Zeocin antibiotic for selection when I propagate these vectors in E. coli?
Yes, you can use Zeocin antibiotic for selection in E. coli. However, keep in mind that for Zeocin antibiotic to be active, the salt concentration of the medium must remain low (<90 mM) and the pH must be 7.5. Prepare LB broth and LB agar plates using low-salt (5 g NaCl/liter) LB.
What is the difference between pSecTag2 and pSecTag2/Hygro vectors?
The only difference between these vectors is that the pSecTag2 vectors have the Zeocin antibiotic-resistance gene for stable selection, whereas the pSecTag2/Hygro vectors have the Hygromycin B resistance gene for stable selection.
I would like to get secreted expression of my protein. What are your recommendations?
You can insert an N-terminal secretion signal or leader sequence upstream of your gene and in-frame with the gene sequence to facilitate secreted expression of the protein. We actually offer the pSecTag2 (Cat. No. V90020) and pSecTag2/Hygro (Cat. No. V91020) vectors designed for this purpose. These vectors contain the N-terminal murine Ig kappa-chain secretion signal for secreted expression of the protein of interest.
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