Relative abundance of dmdA clades in two metagenomic (top) and three metatranscriptomic (bottom) data sets collected on multiple HOT cruises at Stn ALOHA (11, 14, 41, 48, 51). The five clades (A, B, C, D, and E) plus U (which designates unclassified dmdA sequences) are shown as percentages of total dmdA hits. The number of hits to each clade is shown in parentheses.