Price Information
| Cat No. | Plasmid Name | Availability | Add to cart |
|---|---|---|---|
| V011025 | pET-20b(+) | In stock, instant shipping |
Buy one, get one free! |
Two tubes of lyophilized plasmid will be delivered, each tube is about 5µg.
Basic Vector Information
- Vector Name:
- pET-20b(+)
- Antibiotic Resistance:
- Ampicillin
- Length:
- 3716 bp
- Type:
- pET & Duet Vectors (Novagen)
- Replication origin:
- ori
- Source/Author:
- Novagen (EMD Millipore)
- Copy Number:
- High copy number
pET-20b(+) vector Map
Plasmid Protocol
1. Centrifuge at 5,000×g for 5 min.
2. Carefully open the tube and add 20 μl of sterile water to dissolve the DNA.
3. Close the tube and incubate for 10 minutes at room temperature.
4. Briefly vortex the tube and then do a quick spin to concentrate the liquid at the bottom. Speed is less than 5000×g.
5. Store the plasmid at -20 ℃.
6. The concentration of plasmid re-measurement sometimes differs from the nominal value, which may be due to the position of the lyophilized plasmid in the tube, the efficiency of the re-dissolution, the measurement bias, and adsorption on the wall of the tube, therefore, it is recommended to transform and extract the plasmid before using it
General Plasmid Transform Protocol
1. Take one 100μl of the competent cells and thaw it on ice for 10min, add 2μl of plasmid, then ice bath for 30min, then heat-shock it at 42℃ for 60s, do not stir, and then ice bath for 2min.
2. Add 900μl of LB liquid medium without antibiotics, and incubate at 37℃ for 45min (30℃ for 1-1.5 hours) with 180rpm shaking.
3. Centrifuge at 6000rpm for 5min, leave only 100μl of supernatant to resuspend the bacterial precipitate and spread it onto the target plasmid-resistant LB plate.
4. Invert the plate and incubate at 37℃ for 14h, or at 30℃ for 20h.
5. Pick a single colony into LB liquid medium, add the corresponding antibiotics, incubate at 220rpm for 14h, and extract the plasmid according to the experimental needs and the instructions of the plasmid extraction kit.
pET-20b(+) vector Sequence
LOCUS pET-20b(+). 3716 bp DNA circular SYN 01-JAN-1980
DEFINITION Bacterial vector that encodes a signal sequence for expression of
proteins in the periplasm.
ACCESSION .
VERSION .
KEYWORDS pET-20b(+)
SOURCE synthetic DNA construct
ORGANISM synthetic DNA construct
REFERENCE 1 (bases 1 to 3716)
AUTHORS Novagen (EMD Millipore)
TITLE Direct Submission
REFERENCE 2 (bases 1 to 3716)
AUTHORS .
TITLE Direct Submission
COMMENT SGRef: number: 1; type: "Journal Article"
FEATURES Location/Qualifiers
source 1..3716
/mol_type="other DNA"
/organism="synthetic DNA construct"
terminator complement(26..73)
/label=T7 terminator
/note="transcription terminator for bacteriophage T7 RNA
polymerase"
CDS complement(140..157)
/label=6xHis
/note="6xHis affinity tag"
misc_feature 158..225
/label=MCS
/note="MCS"
/note="multiple cloning site"
sig_peptide complement(224..289)
/label=pelB signal sequence
/note="leader peptide for secretion"
RBS complement(297..319)
/label=RBS
/note="efficient ribosome binding site from bacteriophage
T7 gene 10 (Olins and Rangwala, 1989)"
promoter complement(351..369)
/label=T7 promoter
/note="promoter for bacteriophage T7 RNA polymerase"
CDS 878..1066
/label=rop
/note="Rop protein, which maintains plasmids at low copy
number"
misc_feature 1171..1313
/label=bom
/note="basis of mobility region from pBR322"
rep_origin complement(1499..2087)
/direction=LEFT
/label=ori
/note="high-copy-number ColE1/pMB1/pBR322/pUC origin of
replication"
CDS complement(2261..3118)
/label=AmpR
/note="beta-lactamase"
promoter complement(3119..3223)
/label=AmpR promoter
rep_origin complement(3250..3705)
/direction=LEFT
/label=f1 ori
/note="f1 bacteriophage origin of replication; arrow
indicates direction of (+) strand synthesis"