MRK_SwissProt_TrEMBL.rpt is the only file needed here as a list of valid...

MRK_SwissProt_TrEMBL.rpt is the only file needed here as a list of valid accession is obtained from the database itself. This is the first draft of the MGD/MGI data also known as markersymbol in the ensembl code. Note the data can also be gained from parsing the Swissprot files but this data maybe older.