COGs Phylogenetic classification of proteins encoded in complete genomes COGs on FTP 2003 COGs, 2014 update, HTML 2003 COGs, 2014 update, data 2003 COGs, original format 2003 KOGs, original format 2003 COGs arCOGs NCVOGs mimiCOOGs 2011 POGs, annotated 2011 POGs, extended 2013 POGs COG software Publications Original COG paper. Science 1997 Oct 24;278(5338):631-7 2003 database update. BMC Bioinformatics 2003 Sep 11;4(1):41 2003 eukaryotic KOGs. Genome Biol. 2004 Jan 15;5(2):R7. Cyanobacterial COGs. Proc Natl Acad Sci U.S.A. 2006 Aug 29;103(35):13126-13131. Lactic acid bacteria COGs. Proc Natl Acad Sci U.S.A. 2006 Oct 17;103(42):15611-15616. 2007 archaeal COGs. Biol Direct 2007 Nov 27;2:33. NCLDV COGs. Virol J. 2009 Dec 17;6:223. Improved COG algorithm. Bioinformatics 2010 Jun 15;26(12):1481-1487. 2011 phage COGs. J Bacteriol. 2011 Apr;193(8):1806-1814. Orthologs and BBH. Genome Biol Evol. 2012 Jan;4(12):1286-1294. 2012 archaeal COGs. Biol Direct 2012 Dec 14;7:46. 2013 phage COGs. J Bacteriol. 2013 Mar;195(5):941-950. mimiCOGs. Virol J. 2013 Apr 4;10:106. 2014 update of 2003 COGs. Nucleic Acids Res. 2015 Jan;43:D261-D269. 2014 archaeal COGs. Life 2015 Mar 10;5(1):818-840. The previously existing COG pages are retired. Comments and questions to cogs@ncbi.nlm.nih.gov or to the project supervisor.