Repeats are detected on the sequence resulting in repeat features. Gens are predicted with GenScan. Genscan produces Sequence features which represenmt Exon guesses. As well it outputs the assumed peptide sequence for the prediction. It does not neccessarily deliver the first exon of the gen and the first two nucleotides are not neccessarily in the resulting peptide.
Results are more similarity features.
Gens are built on virtual contigs. Exons, Transcripts and Gens are written into EnsEMBL database.