Comprehensive set of gene anntotations including reference chromosomes, scaffoldings, assebly patches, and alternative loci. Intron features for each transcripts have been added to the annotation set. Data is specific to GENCODE Release 34 (Ensembl 100). Features include: gene, transcript, exon, intron, CDS, UTR, start_codon, stop_codon, and Selenocysteine.