Exposes an annotation databases generated from UCSC by exposing these as TxDb objects
conda install -c bioconda bioconductor-txdb.rnorvegicus.ucsc.rn4.ensgene
conda install -c bioconda/label/gcc7 bioconductor-txdb.rnorvegicus.ucsc.rn4.ensgene
conda install -c bioconda/label/cf201901 bioconductor-txdb.rnorvegicus.ucsc.rn4.ensgene