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. 2014 Nov 19;5:594. doi: 10.3389/fmicb.2014.00594

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Copyright © 2014 Purcell, Mikucki, Achberger, Alekhina, Barbante, Christner, Ghosh, Michaud, Mitchell, Priscu, Scherer, Skidmore, Vick-Majors and WISSARD Science Team.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Phylogenetic tree of SLW sediments aprA OTUs. Neighbor-joining reconstruction of 16 aprA sequences from SLW sediments and the most identical aprA-containing cultured organisms and environmental sequences. Values at nodes indicate bootstrap support from 1000 replicates. One representative aprA sequence from each of the 16 operational taxonomic units (OTUs) was randomly selected and included. SLW aprA OTUs are in bold and the total number of sequences obtained within that OTU are in parentheses. Lineage designations on the right are from Meyer and Kuever (2007c). Pyrobaculum aerophilum was used as an outgroup reference. Scale bar indicates the branch length corresponding to 0.1 substitutions per amino acid position.