user-defined upper limit for the number of target sequences returned
Alignment
region of similarity between target and query sequences
E-value
a BLAST statistic representing the significance of an alignment, values close to zero
indicate high sequence similarity with low probability of the similarity occurring by chance
Identities
the number of exact nucleotide matches over the alignment, expressed as a fraction
and a percentage
Query Coverage
the length of the query sequence that matches the target sequence in the
alignment
Bit Score
a BLAST statistic measuring the quality of an alignment, higher values indicate a
more significant match
Span
the length of the alignment, including gaps
About Search by Sequence
Search by Sequence performs a nucleotide-nucleotide BLAST search against Addgene’s plasmid sequence database.
BLAST returns plasmids with similarity to the query sequence.
Results are sorted by E-value, a statistic from BLAST that describes the significance of a match.
Lower values are considered better matches.
FASTA headers and numbers at the beginning of each line will be removed.
The query should only contain DNA characters.
Tips for Success
Enter a distinct sequence that is an important, differentiating feature. For example, the coding region of
a gene, instead of the plasmid origin of replication.
Inspect the percent identity, query coverage, and alignment details to determine if a result match is satisfactory.
Visit the corresponding plasmid webpage to view additional details about a matching plasmid.
If no results are returned:
Try a different isoform or region of the desired sequence.
Choose a different BLAST database. Try the general “All Addgene Plasmids” (default selection),
instead of a specific database, such as “Plant Expression Plasmids”
Try selecting a different BLAST algorithm:
megablast: Designed for comparing sequences within the same, or closely related, species.
Default selection.
blastn: Designed for comparing sequences from different species. May return additional results,
if exact species match is not required.
blastn-short: Optimized for searching with shorter sequences (<= 30 nucleotides)
but can still be effective with slightly larger sequences.
There may not be a match in our database.
You can adjust the Max Results setting on the results page from 25 to 500. If many sequences share the same top E-value,
only a truncated set of equally high-scoring matches will be shown. Set the Max Results to 500 to see more matches.
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CRISPR/Cas based plant genome editing and gene regulation; expresses 3×FLAG-NLS-zCas9-NLS, gRNA scaffold for insertion of target sequence (AtU6-26 promoter), Kan resistance
3rd generation lenti sgRNA cloning backbone with MS2 loops at tetraloop and stemloop 2 and EF1a-zeo resistance marker. Contains BsmBI sites for insertion of spacer sequences.
3rd generation lenti sgRNA cloning backbone with MS2 loops at tetraloop and stemloop 2 and EF1a-puro resistance marker. Contains BsmBI sites for insertion of spacer sequences.
Single-plasmid V. cholerae CAST system, encodes all proteins, crRNA, and donor DNA. Entry vector encodes non-targeting crRNA, with BsaI sites for spacer cloning. pBBR1 backbone.
Single-plasmid V. cholerae CAST. Encodes all proteins, crRNA, donor DNA; non-targeting crRNA with BsaI sites. Reverse (R) order minimizes self-targeting; MmeI site for Tn-seq; pBBR1 backbone.
HIV-1 LTR driven reporter vector that retains complete LTRs, tat, and rev, but has a frameshift mutation in env, an ngfr reporter gene in place of nef, and gfp in place of gag, pol, vif, and vpr
Effector expression for V. cholerae CAST system, encodes all protein and RNA components. Entry vector encodes non-targeting crRNA, with BsaI sites for spacer cloning. pCDF backbone.
CRISPR/Cas based plant genome editing and gene regulation; expresses 3×FLAG-NLS-zCas9-NLS, gRNA scaffold for insertion of target sequence (OsU3 promoter), Bar resistance
CRISPR/Cas based plant genome editing and gene regulation; expresses 3×FLAG-NLS-zCas9-NLS, gRNA scaffold for insertion of target sequence (TaU3 promoter), Bar resistance
P2A peptide from porcine teschovirus-1 flanked by restriction sites in shuttle vector for easy cloning of multiple separate proteins to be expressed from single message