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Expressed Sequence Tag is defined as
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- a partial sequence of a codon randomly selected from DNA library
- the characteristic gene expressed in the cell
- the protein coding DNA sequence of a gene
- uncharacterized fragment for DNA presence in the cell
Correct Option: A
EST is 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. An EST is a sequence tagged site (STS) derived from cDNA library.
EST’s sequence can be submiited or accessed from 3 universal databases- GenBank, DDBJ, EMBL. NCBI also has a database exclusively for EST generation are individual from a cDNA library.
