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The Reference Sequence (RefSeq) database [1] is an open access, annotated and curated collection of publicly available nucleotide sequences (DNA, RNA) and their protein products. RefSeq was introduced in 2000.
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The extensible NEXUS file format is widely used in bioinformatics.It stores information about taxa, morphological and molecular characters, distances, genetic codes, assumptions, sets, trees, etc. [1] Several popular phylogenetic programs such as PAUP*, [2] MrBayes, [3] Mesquite, [4] MacClade [5] and SplitsTree [6] use this format.
The translation table list below follows the numbering and designation by NCBI. [2] Four novel alternative genetic codes were discovered in bacterial genomes by Shulgina and Eddy using their codon assignment software Codetta, and validated by analysis of tRNA anticodons and identity elements; [ 3 ] these codes are not currently adopted at NCBI ...
This format matched the different sequencing chemistry used by SOLiD sequencers. Initial representations only used nucleotide bases at the start of the sequence, but later versions included bases embedded at periodic intervals to improve basecalling and mapping accuracy. The quality values for CSFASTQ are identical to those of the Sanger format.
This allows a sequence that was obtained from a database to be labelled with a reference to its database record. The database identifier format is understood by the NCBI tools like makeblastdb and table2asn. The following list describes the NCBI FASTA defined format for sequence identifiers. [9]
Sequence Alignment Map (SAM) is a text-based format originally for storing biological sequences aligned to a reference sequence developed by Heng Li and Bob Handsaker et al. [1] It was developed when the 1000 Genomes Project wanted to move away from the MAQ mapper format and decided to design a new format.
HTML is the default output format for NCBI's web-page. Results for NCBI-BLAST are presented in graphical format with all the hits found, a table with sequence identifiers for the hits having scoring related data, along with the alignments for the sequence of interest and the hits received with analogous BLAST scores for these. [8]