The National Center for Biotechnology Information (NCBI) advances science and health by providing access to genomic and biomedical information. What does NCBI do?
Fields available for all Sequence Databases (Nucleotide, Protein, EST, GSS)
PubMed search fields description and tags can be found here.
Genbank sample record containing detailed description of each that data element or field
GEO Datasets and GEO Profiles query fields and examples
Structure (Molecular Modeling Database) search fields
RefSeq accession numbers can be distinguished from GenBank accessions by their distinct prefix format of 2 characters followed by an underscore character ('_')
GenBank Accession numbers for nucleotide, protein, WGS, MGA
Sequence Viewer symbol and color legend
A list of how to accomplish different tasks by using NCBI resources.