gtf_dataframe: data frame (in gtf-inspired format) for chromosome 22, hg19
Description
In the data frame gtf_dataframe, each
row corresponds to an exon / coding sequence / start codon / stop codon,
and the columns correspond to standard GTF columns denoting annotated
genomic features. See
http://www.ensembl.org/info/website/upload/gff.html.