Figure 6

Phylogeny of the rhodopsin gene fragments detected in the metagenomic datasets.

Reference sequences have been introduced to provide a framework and represent all major types of microbial rhodopsins described (identified by the name of the microbe and accession number in GenBank). The metagenomic reads are all identified by the name of the dataset from which they were identified except for the one retrieved from the Candidatus Haloredivivus genome. The numbers of identical sequences are indicated in brackets after each read identifier.