Gene features from the 'KnownGene' track from UCSC. (GTF). Features include 5UTR, 3UTR, CDS, exon, start_codon, stop_codon, transcript. Features are comprised of gene predictions based on data from Refseq, GenBank, CCDS, RFam, and tRNA genes tracks. IDs correspond to the UCSC knowGene IDs. Remapped from UCSC hg19 to Ensembl GRCh37
