comprehensive mouse GTF for discovery of novel transcripts? Beyond GENCODE M3

Question

[trakhtenberg]

Hello,

Did anyone create a comprehensive mouse GTF for discovery of novel transcripts? GENCODE M3 is based on the full Ensembl transcript list, but not all refseq or Genbank transcripts are included. Has anyone integrated these GTFs in a non-redundant manner and after filtering-out erroneous entries? Or at least just in a non-redundant manner with the UCSC Genes Track which integrates filtered Refseq and Genbank?

Thank you