Table 1Types of Map Viewer annotation provided by NCBI

Featurea Coordinate systemb Representative mapsc
STS Sequence (Mb), Radiation hybrid (cRay), Genetic (cM), Clone content (ordinal), CytogeneticSTS, STSnw, G3, GM4, GeneMap'99, TNG, Marshfield, Genethon, deCode, Whitehead YAC, phenotype maps such as Quantitative Trait Loci (QTL)
Clones Sequence, CytogeneticClone, BES, Components
 ExpressionSequenceSAGE tag, UniGene
Genes Sequence (Mb), Cytogenetic (band names)Genes_seq, Genes_cyto
 Gene-relatedSequence, CytogeneticUniGene, GenomeScan, Mitelman recurrent breakpoint, morbid
Variation Sequence (Mb)Variation
 Published accessionsSequence (Mb)GenBank
 PhenotypeCytogenetic, Cytogenetic (abnormalities), SequenceOMIM's morbid map, Mitelman's recurrent breakpoint, QTL (in progress)
Source clones Sequence (Mb)Component
 HomologySequence (Mb)Indirectly via LocusLink or UniGene. For mouse and human, through the homology (hm) link to the mouse–human homology map
a

The feature column lists the types of objects annotated on maps seen in Map Viewer. Those features in bold type are annotated on the RefSeqs; the rest are provided only from the Map Viewer, and the files are available for FTP transfer.

b

The different map types and coordinate systems that may contain a particular type of feature.

c

A partial enumeration of named maps that represents positions of this feature type.

From: Chapter 20, Using the Map Viewer to Explore Genomes

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The NCBI Handbook [Internet].
McEntyre J, Ostell J, editors.

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