About the Authors

Caroline E. Whidden

Contributed equally to this work with: Caroline E. Whidden, Katrina G. DeZeeuw

Affiliation Department of Chemistry & Biochemistry, Mount Allison University, Sackville, NB, Canada

Katrina G. DeZeeuw

Contributed equally to this work with: Caroline E. Whidden, Katrina G. DeZeeuw

Affiliation Department of Chemistry & Biochemistry, Mount Allison University, Sackville, NB, Canada

Jackie K. Zorz

Affiliation Department of Chemistry & Biochemistry, Mount Allison University, Sackville, NB, Canada

Andrew P. Joy

Affiliation Atlantic Cancer Research Institute, Moncton, NB, Canada

David A. Barnett

Affiliation Atlantic Cancer Research Institute, Moncton, NB, Canada

Milo S. Johnson

Affiliation Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America

Olga Zhaxybayeva

olga.zhaxybayeva@dartmouth.edu (OZ); acockshutt@mta.ca (AMC)

Affiliations Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America, Department of Computer Science, Dartmouth College, Hanover, New Hampshire, United States of America

Amanda M. Cockshutt

olga.zhaxybayeva@dartmouth.edu (OZ); acockshutt@mta.ca (AMC)

Affiliation Department of Chemistry & Biochemistry, Mount Allison University, Sackville, NB, Canada

Competing Interests

Amanda M. Cockshutt has read the journal's policy and has the following conflict: Amanda M. Cockshutt is a part owner of Environmental Proteomics NB Inc. who developed with Agrisera AB the antibodies used in this work. The authors confirm that co-author Amanda M. Cockshutt is a PLOS ONE Editorial Board Member. This does not alter the authors' adherence to PLOS ONE Editorial policies and criteria.

Author Contributions

Conceived and designed the experiments: AMC OZ. Performed the experiments: CEW KGD JKZ APJ DAB MSJ. Analyzed the data: CEW KGD JKZ APJ DAB MSJ OZ AMC. Contributed reagents/materials/analysis tools: AMC. Wrote the paper: CEW OZ AMC. Conceived the study, interpreted results and wrote the manuscript: AMC OZ. Performed transcriptional analyses, initial bioinformatics and cloning of PSHCP for antibody generation: KGD. Performed pull down assays and composed much of the manuscript: CEW. Performed quantitative immunoblotting experiments: JKZ. Performed the mass spectrometry experiments: AJ DB. Performed computational analyses of the evolution of rRNA genes in cyanobacteria: MSJ.