Expressed gene See: gene expression
Expressed sequence tag (EST) A short strand of DNA that is a part of a cDNA molecule and can act as identifier of a gene. Used in locating and mapping genes.
See also: cDNA, sequence tagged site ...
[edit] Expressed genes on the inactive X chromosome
A fraction of the genes along the X chromosome escape inactivation on the Xi. The Xist gene is expressed at high levels on the Xi and is not expressed on the Xa.
Expressed gene
See gene expression.
Related Terms:
Gene expression
The process by which a gene's coded information is converted into the structures present and operating in the cell.
Expressed gene: See gene expression.
F
FISH (fluorescence in situ hybridization): A physical mapping approach that uses fluorescein tags to detect hybridization of probes with metaphase chromosomes and with the less- condensed somatic ...
Expressed genes include those that are transcribed into mRNA and then translated into protein and those that are transcribed into RNA but not translated into protein (e.g., transfer and ribosomal RNAs).
(See the Genomics unit for a discussion of computer-based methods for gene identification and microarrays to identify expressed genes.) However, even if we know that a particular sequence is a gene, ...
GC box A component of many eukaryotic promoters, especially those from constitutively expressed genes. The consensus sequence for the GC box is 5'-GGGCGG-3'.
The only other "ome" to shake its origin as a buzzword is proteome, the totality of proteins (expressed genes that are translated) in an organism, tissue type or cell, and proteomics is now well-established as a term for studying the proteome.
 See also: Express, Protein, Expression, Gene, Sequence
  
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