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Articles by Christopher Hamm
A Defined Artificial Saliva Medium Allows Characterization of the Hypothiocyanite Response of Streptococcus sanguinis and Streptococcus mutans
Conflicts of Interest The authors declare no conflicts of interest. Supporting Information Filename Description omi70008-sup-0001-SuppMat.pdf4.7 MB Supporting Table 1: Taxonomic distribution of Har homologs in Grampositive bacterial species (Bacillota clade), determined using custom BioPython script taxon-o-tron.py (Supplemental Code). Supporting Table 2: Strains and plasmids used in this study. Unless otherwise indicated, strains were generated in the course of this work.
Inorganic polyphosphate and the stringent response coordinately control cell division and cell morphology in Escherichia coli
Abstract Bacteria encounter numerous stressors in their constantly changing environments and have evolved many methods to deal with stressors quickly and effectively. One well known and broadly conserved stress response in bacteria is the stringent response, mediated by the alarmone (p)ppGpp. (p)ppGpp is produced in response to amino acid starvation and other nutrient limitations and stresses and regulates both the activity of proteins and expression of genes.
Remembering the life of Adare Meadows 1978 - 2020
Adare I. Meadows January 4, 1978 - September 25, 2020 Follow story To follow Adare's Story, enter your email. You will receive email notifications when changes are made to the online memorial, including when family and friends post to the Guestbook. Back to Adare's story Receive email updates when there are changes to this story. Become the owner of this obituary to manage the guestbook, edit the notice, and more. Adare I. Meadows January 4, 1978 - September 25, 2020 Adare I.
Sympatric, temporally isolated populations of the pine white butterfly Neophasia menapia, are morphologically and genetically differentiated
Temporal isolation remains an understudied, and potentially under-appreciated, mechanism of reproductive isolation. Phenological differences have been discovered in populations of the pine white butterfly (Neophasia menapia), a typically univoltine species found throughout western North America. At two locations in the Coast Range of California there are two periods of adult emergence per year, one in early summer (July) and one in late summer/autumn (September/October).
Selaginella and the satyr: Euptychia westwoodi larval performance on an ancient plant lineage
Members of the plant genus Selaginella are often considered living fossils, as extant taxa are virtually indistinguishable from 300 Ma fossils. In contrast, the brush-footed butterflies are a relatively recent radiation, having diversified primarily within the last 60 Ma. Satyrs are among the most derived of these butterflies, likely radiated ~35 Ma and are known primarily for their high diversity and propensity to feed on grasses and sedges.
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