Annotation of transcribed loci (TL). Based on the overlap with ENSEMBL exons TL are annotated first into “known”, “novel”, and “ambiguous” sets. This first level annotation is followed by a second level annotation. Known TL are annotated as protein coding (“pc”), pseudogene (“pseudo”), non-protein coding (“npc”) or UTR (“utr”) depending on the kind or part of an ENSEMBL gene with which they overlap. Novel TL are classified by their location as gene-associated (“assoc”), “intronic” or “intergenic” TL. The category “assoc” contains TL that extend at least partially within 1kb of either terminal exon of an ENSEMBL gene.