Comparative analysis of RNA families reveals distinct repertoires for each domain of life.

Hoeppner M P, Gardner P P, Poole A M (2012); PLoS Comput Biol., 8(11):e1002752. doi: 10.1371/journal.pcbi.1002752

The potential of methanotrophic bacteria to compensate for food quantity or food quality limitations in Daphnia. Sponge-specific clusters revisited: a comprehensive phylogeny of sponge-associated microorganisms.