My question may sound simple. I'm trying to download the plant ref-seq proteins from NCBI to make blast database and run blastx for contigs resulted from de novo assembly of a non-model plant. As there is several taxonomy ID for plants, like flowering plants (3398), green plants (33090), ...please be ware me how I can get all plant ref-seq protein sequence to have as rich as database? please don't refer me to ftp://ftp.ncbi.nlm.nih.gov/refseq/release/plant/ as it contains mixed refseq sequences, not just protein refseq. thanks in advance.