In this episode, how DNA of giant viruses has contributed extensively to the genome of green algae, and inhibition of E. coli virulence by a metabolic product of arachidonic acid in the intestinal epithelium. Links for this episode:   Giant viral DNA shapes genomes of green algae (Nature) James Van Etten Darwin’s Radio Arachidonic acid and E. coli virulence (mBio) How a pathogenic E. coli infection begins   Music used on TWiM is composed and performed by Ronald Jenkees and used with permission. Send your microbiology questions and comments to twim@microbe.tv