The database was compiled from Ensembl (Cunningham et al. 2019) databases "homo_sapiens_core_99_38" and "mus_musculus_core_99_38". We selected all transcripts where the attribute type was "cds_start_NF"(CDS start not found) or "cds_end_NF" (CDS end not found).
Cunningham, F. et al. Ensembl 2019. Nucleic Acids Res 47, D745-d751 (2019).