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.
This website uses cookies to ensure you get the best experience. By continuing to use this site, you agree to the use of cookies.
Please note: Your browser does not support the features used on Addgene's website. You may not be able to create an account or request plasmids through this website until you upgrade your browser.
Learn more
Please note: Your browser does not fully support some of the features used on Addgene's website. If you run into any problems registering, depositing, or ordering please contact us at [email protected].
Learn more
Fluorescence control plasmid for selecting ncAA-encoding Methanomethylophilus alvus Pyl-RS mutants. Expresses SUMO-sfGFP-WT and M. alvus Pyl-tRNA(6). p15a origin. Tetracycline resistance.
Expresses Methanomethylophilus alvus pyrrolysine tRNA synthetase engineered for 3-nitroY and 3-haloY under GlnS promoter. Used as a control during Ma Pyl tRNA-synthetase validation.
Expression of alpha NTD fused via three alanines to E. coli RNAP subunit beta, aa 831-1057 (β-flap). Can be cut with Not1 and BamHI to replace β-flap with a moiety of interest.
A pyrrolysyl tRNA/tRNA sythetase pair evolved to efficiently incorporate an aliphatic diazirine amino acid into proteins in E. coli and mammalian cells for crosslinking experiments
Plpp/PlacUV5- directed synthesis of the alpha NTD fused to E. coli σ70 region 4. Used as two-hybrid control. For cloning purposes, see Addgene plasmid 53734.
Enables translational incorporation of non-hydrolyzable phosphoserine into proteins at TAG codons in E coli. Do not use for phosphoserine incorporation.
Fluorescence control plasmid for selecting ncAA-encoding Methanomethylophilus alvus Pyl-RS mutants. Expresses sfGFP-WT and M. alvus Pyl-tRNA(6). p15a origin of replication
Fluorescence selection plasmid for selecting ncAA-encoding Methanomethylophilus alvus Pyl-RS mutants. Expresses sfGFP-150TAG and M. alvus Pyl-tRNA(6). p15a origin of replication.