Comprehensive set of gene anntotations including reference chromosomes, scaffoldings, assebly patches, and alternative loci. Data is specific to GENCODE Release 34 (Ensembl 100). Features include: gene, transcript, exon, CDS, UTR, start_codon, stop_codon, and Selenocysteine. Remapped from Ensembl GRCh38 to UCSC hg38. (Scaffoldings wihtout UCSC matches are kept with Ensebml ids)