edf5fb93_ene__Cftr__ENSMUSG00000041301___Biotype
[Name] Cftr-004 [Transcript ID] ENSMUST00000115405 [bp] 6391 [Protein] 600aa [Translation ID] ENSMUSP00000111064 [CCDS] - [UniProt] P26361 [RefSeq] - [Flags] Transcript Support Level 5, for transcripts that are not supported at all by either an mRNA or an EST.The Transcript Support Level (TSL) is a method to highlight the well-supported and poorly-supported transcript models for users. The method relies on the primary data that can support full-length transcript structure: mRNA and EST alignments supplied by UCSC and Ensembl.TSL:5 [Biotype] 
Transcript is thought to undergo nonsense mediated decay, a process which detects nonsense mutations and prevents the expression of truncated or erroneous proteins. Nonsense mediated decay
Ensembl genome browser 81: Mus musculus - Supporting evidence - Gene: Cftr (ENSMUSG00000041301)