<?xml version="1.0" encoding="UTF-8"?> <ul><li id="resources"><ul id="resources-submenu"><li><a href="/guide/all/">All Resources</a></li><li><a href="#chemicals-bioassays">Chemicals & Bioassays</a><ul class="actual-resources-submenu chemicals-bioassays"><li><a href="/biosystems/" title=" Database that groups biomedical literature, small molecules, and sequence data in terms of biological relationships. ">BioSystems</a></li><li><a href="/pcassay" title=" Contributed bioactivity data for PubChem Substances ">PubChem BioAssay</a></li><li><a href="/pccompound" title=" Unique, standardized chemical structures ">PubChem Compound</a></li><li><a href="https://pubchem.ncbi.nlm.nih.gov/search/search.cgi" title=" Searches PubChem Compound by chemical structure ">PubChem Structure Search</a></li><li><a href="/pcsubstance" title=" Provides information on the biological activities of small molecules. ">PubChem Substance</a></li><li><a href="/guide/chemicals-bioassays/">All Chemicals & Bioassays Resources...</a></li></ul></li><li><a href="#dna-rna">DNA & RNA</a><ul class="actual-resources-submenu dna-rna"><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi" title=" Tool for finding local regions of sequence similarity ">BLAST (Basic Local Alignment Search Tool)</a></li><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi?CMD=Web&PAGE_TYPE=BlastDocs&DOC_TYPE=Download" title=" BLAST programs for a local computer ">BLAST (Stand-alone)</a></li><li><a href="/books/NBK25501/ " title=" URL application programming interface for searching, linking and downloading data within NCBI's Entrez system ">E-Utilities</a></li><li><a href="/genbank/" title=" DNA and RNA sequences submitted to NCBI ">GenBank</a></li><li><a href="/WebSub/?tool=genbank" title=" Web tool for simple submissions of nucleotide sequences ">GenBank: BankIt</a></li><li><a href="/projects/Sequin/" title=" Software tool for complex submissions of nucleotide sequences ">GenBank: Sequin</a></li><li><a href="/genbank/tbl2asn2/" title=" Command-line program for submitting sequence data ">GenBank: tbl2asn</a></li><li><a href="/tools/gbench/" title=" Stand-alone application for analyzing sequence data ">Genome Workbench</a></li><li><a href="/genomes/FLU/" title=" Data from the NIAID Influenza Genome Sequencing Project ">Influenza Virus</a></li><li><a href="/nuccore" title=" Nucleotide sequence data in GenBank and RefSeq ">Nucleotide Database</a></li><li><a href="/popset" title=" Sets of nucleotide sequences representing a population ">PopSet</a></li><li><a href="/tools/primer-blast/" title=" Designs PCR primers and analyzes them for target specificity using BLAST. ">Primer-BLAST</a></li><li><a href="/sutils/static/prosplign/prosplign.html" title=" Tool for aligning proteins to genomic DNA ">ProSplign</a></li><li><a href="/refseq/" title=" Curated nucleotide and protein sequences produced by NCBI ">Reference Sequence (RefSeq)</a></li><li><a href="/refseq/rsg/" title=" RefSeqGene reference standards for genomic sequences of well-characterized genes ">RefSeqGene</a></li><li><a href="/Traces/sra/sra.cgi?" title=" Database of sequences reads from next generation sequencing technologies ">Sequence Read Archive (SRA)</a></li><li><a href="/sutils/splign/" title=" Tool for aligning transcripts to genomic DNA ">Splign</a></li><li><a href="/Traces/trace.cgi" title=" DNA chromatograms, base calls, and quality estimates for single-pass reads. ">Trace Archive</a></li><li><a href="/guide/dna-rna/">All DNA & RNA Resources...</a></li></ul></li><li><a href="#data-software">Data & Software</a><ul class="actual-resources-submenu data-software"><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi" title=" Tool for finding local regions of sequence similarity ">BLAST (Basic Local Alignment Search Tool)</a></li><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi?CMD=Web&PAGE_TYPE=BlastDocs&DOC_TYPE=Download" title=" BLAST programs for a local computer ">BLAST (Stand-alone)</a></li><li><a href="/Structure/CN3D/cn3d.shtml" title=" Program for viewing 3D structures and alignments ">Cn3D</a></li><li><a href="/Structure/cdd/wrpsb.cgi" title=" Locates conserved domains within a protein sequence ">Conserved Domain Search Service (CD Search)</a></li><li><a href="/books/NBK25501/ " title=" URL application programming interface for searching, linking and downloading data within NCBI's Entrez system ">E-Utilities</a></li><li><a href="/WebSub/?tool=genbank" title=" Web tool for simple submissions of nucleotide sequences ">GenBank: BankIt</a></li><li><a href="/projects/Sequin/" title=" Software tool for complex submissions of nucleotide sequences ">GenBank: Sequin</a></li><li><a href="/genbank/tbl2asn2/" title=" Command-line program for submitting sequence data ">GenBank: tbl2asn</a></li><li><a href="/tools/gbench/" title=" Stand-alone application for analyzing sequence data ">Genome Workbench</a></li><li><a href="/tools/primer-blast/" title=" Designs PCR primers and analyzes them for target specificity using BLAST. ">Primer-BLAST</a></li><li><a href="/sutils/static/prosplign/prosplign.html" title=" Tool for aligning proteins to genomic DNA ">ProSplign</a></li><li><a href="https://pubchem.ncbi.nlm.nih.gov/search/search.cgi" title=" Searches PubChem Compound by chemical structure ">PubChem Structure Search</a></li><li><a href="/projects/SNP/" title=" The SNP database tools page provides links to the general submission guidelines and to the submission handle request. ">SNP Submission Tool</a></li><li><a href="/sutils/splign/" title=" Tool for aligning transcripts to genomic DNA ">Splign</a></li><li><a href="/Structure/VAST/vast.html" title=" Tool that generates 3D structural alignments ">Vector Alignment Search Tool (VAST)</a></li><li><a href="/guide/data-software/">All Data & Software Resources...</a></li></ul></li><li><a href="#domains-structures">Domains & Structures</a><ul class="actual-resources-submenu domains-structures"><li><a href="/biosystems/" title=" Database that groups biomedical literature, small molecules, and sequence data in terms of biological relationships. ">BioSystems</a></li><li><a href="/Structure/CN3D/cn3d.shtml" title=" Program for viewing 3D structures and alignments ">Cn3D</a></li><li><a href="/cdd" title=" Database of conserved protein domains represented by multiple sequence alignments ">Conserved Domain Database (CDD)</a></li><li><a href="/Structure/cdd/wrpsb.cgi" title=" Locates conserved domains within a protein sequence ">Conserved Domain Search Service (CD Search)</a></li><li><a href="/structure/" title=" Database of 3D macromolecular structures derived from PDB ">Structure (Molecular Modeling Database)</a></li><li><a href="/Structure/VAST/vast.html" title=" Tool that generates 3D structural alignments ">Vector Alignment Search Tool (VAST)</a></li><li><a href="/guide/domains-structures/">All Domains & Structures Resources...</a></li></ul></li><li><a href="#genes-expression">Genes & Expression</a><ul class="actual-resources-submenu genes-expression"><li><a href="/biosystems/" title=" Database that groups biomedical literature, small molecules, and sequence data in terms of biological relationships. ">BioSystems</a></li><li><a href="/gap" title=" Genotype/Phenotype association studies ">Database of Genotypes and Phenotypes (dbGaP)</a></li><li><a href="/books/NBK25501/ " title=" URL application programming interface for searching, linking and downloading data within NCBI's Entrez system ">E-Utilities</a></li><li><a href="/gene" title=" Database of gene loci and associated transcripts and proteins ">Gene</a></li><li><a href="/geo/" title=" Gene Expression Omnibus (GEO) Database ">Gene Expression Omnibus (GEO) Database </a></li><li><a href="/gds" title=" Curated collections of gene expression data sets ">Gene Expression Omnibus (GEO) Datasets</a></li><li><a href="/geoprofiles/" title=" Database of gene expression Profiles for individual sequences ">Gene Expression Omnibus (GEO) Profiles</a></li><li><a href="/tools/gbench/" title=" Stand-alone application for analyzing sequence data ">Genome Workbench</a></li><li><a href="/homologene" title=" Sets of homologous eukaryotic genes ">HomoloGene</a></li><li><a href="/omim" title=" Database of human genes and genetic disorders ">Online Mendelian Inheritance in Man (OMIM)</a></li><li><a href="/refseq/rsg/" title=" RefSeqGene reference standards for genomic sequences of well-characterized genes ">RefSeqGene</a></li><li><a href="/guide/genes-expression/">All Genes & Expression Resources...</a></li></ul></li><li><a href="#genetics-medicine">Genetics & Medicine</a><ul class="actual-resources-submenu genetics-medicine"><li><a href="/books" title=" Online biomedical books ">Bookshelf</a></li><li><a href="/gap" title=" Genotype/Phenotype association studies ">Database of Genotypes and Phenotypes (dbGaP)</a></li><li><a href="/gtr/" title=" Detailed information about genetic tests and labs ">Genetic Testing Registry</a></li><li><a href="/genomes/FLU/" title=" Data from the NIAID Influenza Genome Sequencing Project ">Influenza Virus</a></li><li><a href="/omim" title=" Database of human genes and genetic disorders ">Online Mendelian Inheritance in Man (OMIM)</a></li><li><a href="/pubmed" title=" Biomedical literature abstracts ">PubMed</a></li><li><a href="/pmc/" title=" Free, full-text articles ">PubMed Central (PMC)</a></li><li><a href="/pubmed/clinical " title=" Directory of PubMed queries about clinical topics ">PubMed Clinical Queries</a></li><li><a href="/refseq/rsg/" title=" RefSeqGene reference standards for genomic sequences of well-characterized genes ">RefSeqGene</a></li><li><a href="/guide/genetics-medicine/">All Genetics & Medicine Resources...</a></li></ul></li><li><a href="#genomes-maps">Genomes & Maps</a><ul class="actual-resources-submenu genomes-maps"><li><a href="/dbvar" title=" A database of genomic structural variation ">Database of Genomic Structural Variation (dbVar)</a></li><li><a href="/genbank/tbl2asn2/" title=" Command-line program for submitting sequence data ">GenBank: tbl2asn</a></li><li><a href="/sites/genome" title=" Curated genomic DNA sequences ">Genome</a></li><li><a href="/bioproject/" title=" Central status pages for genome sequencing projects ">Genome Project</a></li><li><a href="/genome/gdv/" title="GDV is a genome browser supporting the exploration and analysis of eukaryotic RefSeq Genome assemblies. ">Genome Data Viewer (GDV)</a></li><li><a href="/tools/gbench/" title=" Stand-alone application for analyzing sequence data ">Genome Workbench</a></li><li><a href="/genomes/FLU/" title=" Data from the NIAID Influenza Genome Sequencing Project ">Influenza Virus</a></li><li><a href="/nuccore" title=" Nucleotide sequence data in GenBank and RefSeq ">Nucleotide Database</a></li><li><a href="/popset" title=" Sets of nucleotide sequences representing a population ">PopSet</a></li><li><a href="/sutils/static/prosplign/prosplign.html" title=" Tool for aligning proteins to genomic DNA ">ProSplign</a></li><li><a href="/Traces/sra/sra.cgi?" title=" Database of sequences reads from next generation sequencing technologies ">Sequence Read Archive (SRA)</a></li><li><a href="/sutils/splign/" title=" Tool for aligning transcripts to genomic DNA ">Splign</a></li><li><a href="/Traces/trace.cgi" title=" DNA chromatograms, base calls, and quality estimates for single-pass reads. ">Trace Archive</a></li><li><a href="/guide/genomes-maps/">All Genomes & Maps Resources...</a></li></ul></li><li><a href="#homology">Homology</a><ul class="actual-resources-submenu homology"><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi" title=" Tool for finding local regions of sequence similarity ">BLAST (Basic Local Alignment Search Tool)</a></li><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi?CMD=Web&PAGE_TYPE=BlastDocs&DOC_TYPE=Download" title=" BLAST programs for a local computer ">BLAST (Stand-alone)</a></li><li><a href="/sutils/blink.cgi?mode=query" title=" Pre-computed reports showing proteins with similar sequences ">BLAST Link (BLink)</a></li><li><a href="/cdd" title=" Database of conserved protein domains represented by multiple sequence alignments ">Conserved Domain Database (CDD)</a></li><li><a href="/Structure/cdd/wrpsb.cgi" title=" Locates conserved domains within a protein sequence ">Conserved Domain Search Service (CD Search)</a></li><li><a href="/homologene" title=" Sets of homologous eukaryotic genes ">HomoloGene</a></li><li><a href="/proteinclusters" title=" Clusters of related proteins from prokaryotes and organelles ">Protein Clusters</a></li><li><a href="/guide/homology/">All Homology Resources...</a></li></ul></li><li><a href="#literature">Literature</a><ul class="actual-resources-submenu literature"><li><a href="/books" title=" Online biomedical books ">Bookshelf</a></li><li><a href="/books/NBK25501/ " title=" URL application programming interface for searching, linking and downloading data within NCBI's Entrez system ">E-Utilities</a></li><li><a href="/nlmcatalog/journals" title=" Information on journals cited by NCBI records ">Journals in NCBI Databases</a></li><li><a href="/mesh" title=" Controlled vocabulary for MEDLINE ">MeSH Database</a></li><li><a href="/books/NBK143764/" title=" Introductory articles about NCBI resources ">NCBI Handbook</a></li><li><a href="/books/NBK3831/" title=" Online, searchable help documentation ">NCBI Help Manual</a></li><li><a href="https://ncbiinsights.ncbi.nlm.nih.gov" title=" NCBI's monthly newsletter ">NCBI News & Blog</a></li><li><a href="/pubmed" title=" Biomedical literature abstracts ">PubMed</a></li><li><a href="/pmc/" title=" Free, full-text articles ">PubMed Central (PMC)</a></li><li><a href="/pubmed/clinical " title=" Directory of PubMed queries about clinical topics ">PubMed Clinical Queries</a></li><li><a href="/guide/literature/">All Literature Resources...</a></li></ul></li><li><a href="#proteins">Proteins</a><ul class="actual-resources-submenu proteins"><li><a href="/biosystems/" title=" Database that groups biomedical literature, small molecules, and sequence data in terms of biological relationships. ">BioSystems</a></li><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi" title=" Tool for finding local regions of sequence similarity ">BLAST (Basic Local Alignment Search Tool)</a></li><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi?CMD=Web&PAGE_TYPE=BlastDocs&DOC_TYPE=Download" title=" BLAST programs for a local computer ">BLAST (Stand-alone)</a></li><li><a href="/sutils/blink.cgi?mode=query" title=" Pre-computed reports showing proteins with similar sequences ">BLAST Link (BLink)</a></li><li><a href="/cdd" title=" Database of conserved protein domains represented by multiple sequence alignments ">Conserved Domain Database (CDD)</a></li><li><a href="/Structure/cdd/wrpsb.cgi" title=" Locates conserved domains within a protein sequence ">Conserved Domain Search Service (CD Search)</a></li><li><a href="/books/NBK25501/ " title=" URL application programming interface for searching, linking and downloading data within NCBI's Entrez system ">E-Utilities</a></li><li><a href="/sutils/static/prosplign/prosplign.html" title=" Tool for aligning proteins to genomic DNA ">ProSplign</a></li><li><a href="/proteinclusters" title=" Clusters of related proteins from prokaryotes and organelles ">Protein Clusters</a></li><li><a href="/protein" title=" Protein sequence data ">Protein Database</a></li><li><a href="/refseq/" title=" Curated nucleotide and protein sequences produced by NCBI ">Reference Sequence (RefSeq)</a></li><li><a href="/guide/proteins/">All Proteins Resources...</a></li></ul></li><li><a href="#sequence-analysis">Sequence Analysis</a><ul class="actual-resources-submenu sequence-analysis"><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi" title=" Tool for finding local regions of sequence similarity ">BLAST (Basic Local Alignment Search Tool)</a></li><li><a href="https://blast.ncbi.nlm.nih.gov/Blast.cgi?CMD=Web&PAGE_TYPE=BlastDocs&DOC_TYPE=Download" title=" BLAST programs for a local computer ">BLAST (Stand-alone)</a></li><li><a href="/sutils/blink.cgi?mode=query" title=" Pre-computed reports showing proteins with similar sequences ">BLAST Link (BLink)</a></li><li><a href="/Structure/cdd/wrpsb.cgi" title=" Locates conserved domains within a protein sequence ">Conserved Domain Search Service (CD Search)</a></li><li><a href="/tools/gbench/" title=" Stand-alone application for analyzing sequence data ">Genome Workbench</a></li><li><a href="/genomes/FLU/" title=" Data from the NIAID Influenza Genome Sequencing Project ">Influenza Virus</a></li><li><a href="/tools/primer-blast/" title=" Designs PCR primers and analyzes them for target specificity using BLAST. ">Primer-BLAST</a></li><li><a href="/sutils/static/prosplign/prosplign.html" title=" Tool for aligning proteins to genomic DNA ">ProSplign</a></li><li><a href="/sutils/splign/" title=" Tool for aligning transcripts to genomic DNA ">Splign</a></li><li><a href="/guide/sequence-analysis/">All Sequence Analysis Resources...</a></li></ul></li><li><a href="#taxonomy">Taxonomy</a><ul class="actual-resources-submenu taxonomy"><li><a href="/taxonomy" title=" The NCBI taxonomy tree in Entrez ">Taxonomy</a></li><li><a href="/Taxonomy/Browser/wwwtax.cgi?mode=Root" title=" Displays and links Entrez data to each taxonomic node ">Taxonomy Browser</a></li><li><a href="/Taxonomy/CommonTree/wwwcmt.cgi" title=" Creates custom taxonomic trees ">Taxonomy Common Tree</a></li><li><a href="/guide/taxonomy/">All Taxonomy Resources...</a></li></ul></li><li><a href="#training-tutorials">Training & Tutorials</a><ul class="actual-resources-submenu training-tutorials"><li><a href="/education/" title=" Central page providing links to tutorials and training materials ">NCBI Education Page</a></li><li><a href="/books/NBK143764/" title=" Introductory articles about NCBI resources ">NCBI Handbook</a></li><li><a href="/books/NBK3831/" title=" Online, searchable help documentation ">NCBI Help Manual</a></li><li><a href="https://ncbiinsights.ncbi.nlm.nih.gov" title=" NCBI's monthly newsletter ">NCBI News & Blog</a></li><li><a href="/guide/training-tutorials/">All Training & Tutorials Resources...</a></li></ul></li><li><a href="#variation">Variation</a><ul class="actual-resources-submenu variation"><li><a href="/dbvar" title=" A database of genomic structural variation ">Database of Genomic Structural Variation (dbVar)</a></li><li><a href="/gap" title=" Genotype/Phenotype association studies ">Database of Genotypes and Phenotypes (dbGaP)</a></li><li><a href="/snp" title=" Database of nucleotide sequence polymorphisms ">Database of Single Nucleotide Polymorphisms (dbSNP)</a></li><li><a href="/projects/SNP/" title=" The SNP database tools page provides links to the general submission guidelines and to the submission handle request. ">SNP Submission Tool</a></li><li><a href="/guide/variation/">All Variation Resources...</a></li></ul></li></ul></li><li id="howto"><ul id="howto-submenu"><li><a href="/guide/all/#howtos">All How To</a></li><li><a href="/guide/chemicals-bioassays/#howtos">Chemicals & Bioassays</a></li><li><a href="/guide/dna-rna/#howtos">DNA & RNA</a></li><li><a href="/guide/data-software/#howtos">Data & Software</a></li><li><a href="/guide/domains-structures/#howtos">Domains & Structures</a></li><li><a href="/guide/genes-expression/#howtos">Genes & Expression</a></li><li><a href="/guide/genetics-medicine/#howtos">Genetics & Medicine</a></li><li><a href="/guide/genomes-maps/#howtos">Genomes & Maps</a></li><li><a href="/guide/homology/#howtos">Homology</a></li><li><a href="/guide/literature/#howtos">Literature</a></li><li><a href="/guide/proteins/#howtos">Proteins</a></li><li><a href="/guide/sequence-analysis/#howtos">Sequence Analysis</a></li><li><a href="/guide/taxonomy/#howtos">Taxonomy</a></li><li><a href="/guide/training-tutorials/#howtos">Training & Tutorials</a></li><li><a href="/guide/variation/#howtos">Variation</a></li></ul></li></ul>