Clusters of Orthologous Groups (COG) Tatusov, R.L., Natale, D.A., Fedorova, N.D., Jackson, J., Jacobs, A., Krylov, D.M., Mekhedov, S.L., Nikolskaya, A.N., Rao, B.S., Wolf, Y.I., Aravind, L., Lanczycki, C., Masumder, R., Sreekumar, K., Vasudevan, S., Walker, D.R., Tatusova, T.A., Yao, K., Yin, J., Koonin, E.V.
Phylogenetic classification of proteins from 44 complete genomes
database summary
