Doubts about Eggnog database and Eggnog mapper

[sarpiens]

Hi, I have a couple of questions about the eggnog database and eggnog mapper:

1. I would be interested in using an older version of the database, EGGNOG 4.5. Should I then use eggnog mapper v1.0.3 or would the latest version v2.1.12 also accept it? Even if it will accept it, would it be better to work with v1.0.3 (because of changes in the program algorithm)?

2. I have found this NOG annotation file for the EGGNOG4.5(http://eggnog45.embl.de/download/eggnog_4.5/data/NOG/NOG.annotations.tsv.gz), but the name of the columns is not indicated. I suspect col1 (NOG), col2(NOG id), col3 and col4(numbers I don't know what they are), col5(I suspect COG categories, please confirm) and col6(description).

Thank you very much in advance.