NUCLEOTIDE DATABASES
NCBI's sequence databases accept genome data from sequencing projects from around the world and serve
as the cornerstone of bioinformatics research.
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An annotated collection of all publicly available nucleotide and
amino acid sequences.
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A collection of expressed sequence tags, or short, single-pass
sequence reads from mRNA (cDNA).
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A database of genome survey sequences, or short, single-pass genomic
sequences.
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A gene homology tool that compares nucleotide sequences between pairs of organisms in
order to identify putative orthologs.
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A collection of high-throughput genome sequences from large-scale
genome sequencing centers, including unfinished and finished sequences.
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A central repository for both single-base nucleotide substitutions
and short deletion and insertion polymorphisms.
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A database of non-redundant reference sequences standards, including
genomic DNA contigs, mRNAs, and proteins for known genes. Multiple
collaborations, both within NCBI and with external groups, support
our data-gathering efforts.
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A database of sequence tagged sites, or short sequences that are
operationally unique in the genome.
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A unified, non-redundant view of sequence tagged sites (STSs).
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A collection of ESTs and full-length mRNA sequences organized into
clusters, each representing a unique known or putative human gene
annotated with mapping and expression information and cross-references to
other sources.
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