Filtering a gff.table with ORF information to keep only the LORFs.
Usage
lorfs(gff.table)
Arguments
gff.table
A gff.table (data.frame) with genomic features information.
Value
A gff.table with a subset of the rows of the argument gff.table.
After this filtering the Type variable in gff.table is changed to "LORF". If you want to
retirve the LORF sequences, use gff2fasta.
Details
For every stop-codon there are usually mutliple possible start-codons in the same reading
frame (nested ORFs). The LORF (Longest ORF) is defined as the longest of these nested ORFs,
i.e. the ORF starting at the most upstream start-codon matching the stop-codon.