This function downloads gff files of query organisms from ENSEMBL.
Arguments
- organism
scientific name of the organism of interest.
- type
biological sequence type.
- id.type
a character, default "toplevel". id type of assembly, either toplevel or primary_assembly usually.
- path
location where file shall be stored.
- release
a numeric, the database release version of ENSEMBL (
db = "ensembl"
). Default isrelease = NULL
meaning that the most recent database version is used.release = 75
would for human would give the stable GRCh37 release in ensembl. Value must be > 46, since ensembl did not structure their data if the standard format before that.