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Linking and profiling sequence alignment data from NCBI-BLAST results with major sequence analysis servers/services: Nucleotide, peptide: 2010 SAM Local and global search with profile Hidden Markov models, more sensitive than PSI-BLAST: Both: Karplus K, Krogh A [15] 1999 SSEARCH Smith-Waterman search, slower but more sensitive than FASTA: Both ...
A BLAST search enables a researcher to compare a subject protein or nucleotide sequence (called a query) with a library or database of sequences, and identify database sequences that resemble the query sequence above a certain threshold.
Link alignment results to analysis tools (Primer design, Gel mobility and Maps, Plasmapper, siRNA design Epitope prediction), Save research logs, Create custom toolbars Accession number, GI number, PDB ID, FASTA , drag-drop from external URL from within the user interface
The framesearch method produces a series of global or local pairwise alignments between a query nucleotide sequence and a search set of protein sequences, or vice versa. Its ability to evaluate frameshifts offset by an arbitrary number of nucleotides makes the method useful for sequences containing large numbers of indels, which can be very ...
A BLAST variant called MegaBLAST indexes 4 databases to speed up alignments. [9] BLAT can extend on multiple perfect and near-perfect matches (default is 2 perfect matches of length 11 for nucleotide searches and 3 perfect matches of length 4 for protein searches), while BLAST extends only when one or two matches occur close together. [1] [9]
In this example there is an NCBI-assigned identifier, and the description holds the original identifier from Solexa/Illumina (as described above) plus the read length. Sequencing was performed in paired-end mode (~500bp insert size), see SRR001666. The default output format of fastq-dump produces entire spots, containing any technical reads and ...
WU-BLAST with XDF was the first BLAST suite to support indexed-retrieval of NCBI standard FASTA-format sequence identifiers (including the entire range of NCBI identifiers); the first to allow retrieval of individual sequences in part or in whole, natively, translated or reverse-complemented; and the first able to dump the entire contents of a ...
The NCBI assigns a unique identifier (taxonomy ID number) to each species of organism. [5] The NCBI has software tools that are available through web browsers or by FTP. For example, BLAST is a sequence similarity searching program. BLAST can do sequence comparisons against the GenBank DNA database in less than 15 seconds.