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Genes & Genomes
Genes & Genomes
What can we help you with?
How do I find out if there is a RefSeq or UniProtKB (Swiss-Prot) sequence that is identical to my protein of interest?
How do I use Gene records to visualize SNPs that are associated with an individual transcript (splice variant) of a gene?
How do I use Gene records to find and download all individual gene-associated SNPs?
How do I find out if the genome for my organism of interest has been sequenced?
How do I use Gene records to access human variation data in Variation Viewer?
How do I find the complete taxonomic lineage for an organism?
What types of genomic sequences are archived in the NCBI Nucleotide database for an organism?
How do I access all sequence records for a genome assembly on the web?
When I search your database for a gene, I obtain too many records. What sequence record should I choose?
How do I obtain a genomic sequence record for a gene using the NCBI Gene database?
How do I find variation information and associated phenotypes for an individual human gene?
How do I obtain a transcript and protein sequence for a gene by using the NCBI Gene database?
How do I find expression data for my gene of interest under various experimental conditions?
How do I find specific gene expression studies?
What are the data sources for the expression displays on the genome data viewer?
Why do I see square brackets around some organism names in the Taxonomy database?
How are organisms in the NCBI Taxonomy database formally named?
What are the sources of the Protein database sequences?
How can I compare expression of a gene of interest between different tissues?
How can I find tissue-specific expression data for a gene of interest?
How do I obtain a curated set of proteins for my organism or taxonomic group?
What was the reason for the removal of a prokaryotic RefSeq protein record and how do I find its replacement?
What is the current number of the protein records in the database and does each record represent a unique protein sequence?
What are accession numbers?
What are Reference Sequence (RefSeq) accession numbers and what information is embedded in their format?
How are GenBank protein sequences determined?
How do I obtain the current human proteome sequences from NCBI?
What are Assembly accession numbers?
How do I obtain subsets of the human proteome?
How do I find protein sequences that belong to a protein family?
Is there an archive of human proteome data?
Where and how do I retrieve human mitochondrial genome sequences, including those from human genealogy studies?
On what sequences do you base NCBI Taxonomy classification and the Taxonomy Common Tree?
How can I find variation features annotated on GenBank records?
What is a genome assembly?
Why are genomes sequenced?
How are genome assemblies generated and what are assembly levels?
Who generates genome assemblies that are present in the NCBI databases?
How does NCBI process submitted genome assemblies and where can I find these?
What is genome annotation?
What are reference and representative genomes and how do I find these?