Definitions for "Expressed Sequence Tag"
Keywords:  cdna, est, dbest, landmark, genome
Randomly selected, partial cDNA sequence; represents it's corresponding mRNA. dbEST is a large database of ESTs at GenBank, NCBI.
A unique stretch of DNA within a coding region of a gene that is useful for identifying full-length genes and serves as a landmark for mapping.
Partial gene sequence data of a cDNA clone which provides a sequence tag for a gene. In order to achieve a very high throughput, these sequences are usually only subjected to a single-pass of sequencing so the error rate in these sequences can be high, perhaps approaching 5%.