EST (cDNA) mapping refers to the mapping of EST (cDNA) sequence file to the reference genome base sequence by using its homology to identify the genomic position from which EST is derived and registering the EST (cDNA) feature at that position.
Depending on the EST library, local redundancy may be high, and many EST features may be mapped to the same site on the genome.
To draw such locally highly redundant EST mapping results on the feature map, there is a feature layout feature called Pack Lane. (For details, please refer to FLS: Feature Layout Style, Pack Lane.)
There are two types of EST mapping.