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protein database and ensembl

Hello, I want to download a reference protein database from Ensembl for human but they show two databases; pep.all.fa and pep.abinitio.fa, which one is used as a reference database?

ensembl

pep.all.fa is used as reference. pep.abinitio.fa contains predictions made based on the genomic sequence and not any other experimental evidence therefore not all entries represent biologically real proteins.

actually this info is in the README file located in the same ftp directory where you download your .fa files, e,g here.

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