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Resolution of Prochlorococcus and Synechococcus Ecotypes by Using 16S-23S Ribosomal DNA Internal Transcribed Spacer Sequences
The results provide further evidence that natural populations of Prochlorococcus and Synechococcus consist of multiple coexisting ecotypes, genetically closely related but physiologically distinct, which may vary in relative abundance with changing environmental conditions. Expand
Triploblastic relationships with emphasis on the acoelomates and the position of Gnathostomulida, Cycliophora, Plathelminthes, and Chaetognatha: a combined approach of 18S rDNA sequences and
For the first time, a data analysis recognizes a clade of acoelomates, the Platyzoa, which is expanded to include the enigmatic phylum Cycliophora, as sister group to Syndermata. Expand
Rapid Diversification of Marine Picophytoplankton with Dissimilar Light-Harvesting Structures Inferred from Sequences of Prochlorococcus and Synechococcus (Cyanobacteria)
Standard phylogenetic methods and newer algorithms insensitive to such biases did not recover different branching patterns within the marine picophytoplankton group, and failed to cluster Prochlorococcus with chloroplasts or other chlorophyll b-containing prokaryotes. Expand
Fine-scale phylogenetic architecture of a complex bacterial community
It is proposed that such microdiverse clusters arise by selective sweeps and persist because competitive mechanisms are too weak to purge diversity from within them, indicating a large predominance of closely related taxa in this community. Expand
Cyclin: A protein specified by maternal mRNA in sea urchin eggs that is destroyed at each cleavage division
Eggs of the sea urchin Lytechinus pictus and oocytes of the surf clam Spisula solidissima also contain proteins that only start to be made after fertilization and are destroyed at certain points in the cell division cycle, and it is proposed to call these proteins the cyclins. Expand
Genotypic Diversity Within a Natural Coastal Bacterioplankton Population
This work shows that this group of coastal bacterioplankton consists of at least a thousand distinct genotypes, each occurring at extremely low environmental concentrations (on average less than one cell per milliliter), and shows extensive allelic diversity and size variation. Expand
High-resolution quantitative imaging of mammalian and bacterial cells using stable isotope mass spectrometry
MIMS makes it possible for the first time to both image and quantify molecules labeled with stable or radioactive isotopes within subcellular compartments. Expand
Teredinibacter turnerae gen. nov., sp. nov., a dinitrogen-fixing, cellulolytic, endosymbiotic gamma-proteobacterium isolated from the gills of wood-boring molluscs (Bivalvia: Teredinidae).
A cellulolytic, dinitrogen-fixing bacterium isolated from the gill tissue of a wood-boring mollusc (shipworm) Lyrodus pedicellatus and 58 additional strains with similar properties, isolated from gills of 24 bivalve species representing 9 of 14 genera of Teredinidae, are described. Expand
Quantitative Imaging of Nitrogen Fixation by Individual Bacteria Within Animal Cells
With multi-isotope imaging mass spectrometry, this approach directly imaged and measured nitrogen fixation by individual bacteria within eukaryotic host cells and demonstrated that fixed nitrogen is used for host metabolism. Expand
Intracellular coexistence of methano- and thioautotrophic bacteria in a hydrothermal vent mussel.
The coexistence of two phylogenetically distinct symbiont species within a single cell, a condition not previously known in any metazoan, is demonstrated in the gills of a Mid-Atlantic RidgeExpand