SELENOS and infection: In this context, it is interesting to note that in the bloom-forming pelagophyte alga A. anophagerfferens, which has the second largest number of selenoproteins reported (50), a large number of redox active selenoproteins were overexpressed upon infection by a giant virus of the Mimiviridae clade [30], which suggests that viral infections, that are also prominent in the picoplanktonic Mamiellophyceae (prasinoviruses; [31]) and have also been described in M. viride [32], may elicit similar responses in their hosts.