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- 保存条件:
负20摄氏度
- 保质期:
3个月
- 英文名:
pET22b-EBFP
- 库存:
100
- 供应商:
LSMBIO
- 规格:
2ug
pET22b-EBFP
Search name
pET22b-EBFP,Plasmid pET22b-EBFP,pET22b-EBFP vector
pET22b-EBFP Information
Promoter: T7/lac
Replicator: ColE1 ori, F1 ori
Terminator: T7 Terminator
Plasmid size: 6177bp
Plasmid Tags: N-pelB, EBFP, C-6 x His
Prokaryotic resistance: ampicillin Amp
Cloned strain: Escherichia coli DH5 alpha
Culture conditions: 37 centigrade, aerobic, LB
Expression host: BL21 (DE3)
Culture conditions: 37 centigrade, aerobic, LB
Inducement: IPTG or lactose and its analogues
5'sequencing primers: T7:TAATACGACTCACTATAGGG
3'sequencing primers: T7-ter:TGCTAGTTATTGCTCAGCGG
Remarks: secretory expression
Use:pET Plasmid
pET22b-EBFP Description
PET22b-EBFP coliform blue fluorescent secretory expression plasmid
pET22b-EBFP Sequence
LOCUS Exported 6177 bp ds-DNA circular SYN 16-MAY-2016
DEFINITION synthetic circular DNA
KEYWORDS pET22b-EBFP
SOURCE synthetic DNA construct
ORGANISM synthetic DNA construct
REFERENCE 1 (bases 1 to 6177)
AUTHORS .
TITLE Direct Submission
JOURNAL Exported Monday, September 5, 2016 from SnapGene Viewer 3.1.4
FEATURES Location/Qualifiers
source 1..6177
/organism="synthetic DNA construct"
/mol_type="other DNA"
rep_origin 12..467
/direction=RIGHT
/note="f1 ori"
/note="f1 bacteriophage origin of replication; arrow
indicates direction of (+) strand synthesis"
promoter 494..598
/gene="bla"
/note="AmpR promoter"
CDS 599..1459
/codon_start=1
/gene="bla"
/product="beta-lactamase"
/note="AmpR"
/note="confers resistance to ampicillin, carbenicillin, and
related antibiotics"
/translation="MSIQHFRVALIPFFAAFCLPVFAHPETLVKVKDAEDQLGARVGYI
ELDLNSGKILESFRPEERFPMMSTFKVLLCGAVLSRIDAGQEQLGRRIHYSQNDLVEYS
PVTEKHLTDGMTVRELCSAAITMSDNTAANLLLTTIGGPKELTAFLHNMGDHVTRLDRW
EPELNEAIPNDERDTTMPAAMATTLRKLLTGELLTLASRQQLIDWMEADKVAGPLLRSA
LPAGWFIADKSGAGERGSRGIIAALGPDGKPSRIVVIYTTGSQATMDERNRQIAEIGAS
LIKHW"
rep_origin 1630..2218
/direction=RIGHT
/note="ori"
/note="high-copy-number ColE1/pMB1/pBR322/pUC origin of
replication"
misc_feature 2404..2546
/note="bom"
/note="basis of mobility region from pBR322"
CDS complement(2648..2839)
/codon_start=1
/gene="rop"
/product="Rop protein, which maintains plasmids at low copy
number"
/note="rop"
/translation="MTKQEKTALNMARFIRSQTLTLLEKLNELDADEQADICESLHDHA
DELYRSCLARFGDDGENL"
CDS complement(3648..4730)
/codon_start=1
/gene="lacI"
/product="lac repressor"
/note="lacI"
/note="The lac repressor binds to the lac operator to
inhibit transcription in E. coli. This inhibition can be
relieved by adding lactose or
isopropyl-beta-D-thiogalactopyranoside (IPTG)."
/translation="MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAEL
NYIPNRVAQQLAGKQSLLIGVATSSLALHAPSQIVAAIKSRADQLGASVVVSMVERSGV
EACKAAVHNLLAQRVSGLIINYPLDDQDAIAVEAACTNVPALFLDVSDQTPINSIIFSH
EDGTRLGVEHLVALGHQQIALLAGPLSSVSARLRLAGWHKYLTRNQIQPIAEREGDWSA
MSGFQQTMQMLNEGIVPTAMLVANDQMALGAMRAITESGLRVGADISVVGYDDTEDSSC
YIPPLTTIKQDFRLLGQTSVDRLLQLSQGQAVKGNQLLPVSLVKRKTTLAPNTQTASPR
ALADSLMQLARQVSRLESGQ"
promoter complement(4731..4808)
/gene="lacI"
/note="lacI promoter"
promoter 5117..5135
/note="T7 promoter"
/note="promoter for bacteriophage T7 RNA polymerase"
protein_bind 5136..5160
/bound_moiety="lac repressor encoded by lacI"
/note="lac operator"
/note="The lac repressor binds to the lac operator to
inhibit transcription in E. coli. This inhibition can be
relieved by adding lactose or
isopropyl-beta-D-thiogalactopyranoside (IPTG)."
RBS 5175..5197
/note="efficient ribosome binding site from bacteriophage
T7 gene 10 (Olins and Rangwala, 1989)"
CDS 5205..5270
/codon_start=1
/gene="pelB (fragment)"
/product="leader peptide for secretion"
/note="pelB signal sequence"
/translation="MKYLLPTAAAGLLLLAAQPAMA"
CDS 5298..6014
/codon_start=1
/product="enhanced blue variant of GFP"
/note="EBFP"
/note="mammalian codon-optimized"
/translation="MVSKGEELFTGVVPILVELDGDVNGHKFSVSGEGEGDATYGKLTL
KFICTTGKLPVPWPTLVTTLTHGVQCFSRYPDHMKQHDFFKSAMPEGYVQERTIFFKDD
GNYKTRAEVKFEGDTLVNRIELKGIDFKEDGNILGHKLEYNFNSHNVYIMADKQKNGIK
VNFKIRHNIEDGSVQLADHYQQNTPIGDGPVLLPDNHYLSTQSALSKDPNEKRDHMVLL
EFVTAAGITLGMDELYK"
CDS 6021..6038
/codon_start=1
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最近在做原核表达,包涵体。以前也做过,但经验不多。一点失败的教训以及纯化过程中的体会,贴出来与大家共享,同时希望得到同行们的指正。 1. 首先介绍一下背景。载体是invitrogen公司的pET22b,Amp抗性。菌株是该公司的BL21 star DE3,是一个蛋白降解酶突变菌株,也就是说是一种优化表达菌株。 2. 第一次失败。第一次做诱导的时候,重复了很多次,但总是诱导不出来。PCR,酶切都正确。但没等测序结果出来就开始做了。失败了。曾在园子求助。后来证明是引物
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