from
The database, one of 'uniprot'
, 'kegg'
, 'pdb'
.
type
The returned protein format, one of fasta
, pdb
, aaseq
.
parallel
An integer, the parallel parameter, indicates how many
process the user would like to use for retrieving
the data (using RCurl), default is 5
.
For regular cases, we recommend a number less than 20
.