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SUMMARY:Mechanisms of microbial elemental sulfur reduction at the communit
 y\, cellular and enzymatic levels - Professor E J Crane (III)\, Pomona Col
 lege\, Claremont\, California
DTSTART:20150608T150000Z
DTEND:20150608T160000Z
UID:TALK59742@talks.cam.ac.uk
CONTACT:Sian Bunnage
DESCRIPTION:Sulfur-based respiration has been proposed to be one of the ea
 rliest energy conserving pathways for life on earth\, and the pathway rema
 ins important to the sulfur cycle in oceans\, the atmosphere\, sediments a
 nd the deep subsurface\, and is inextricably linked to the other elemental
  cycles on the earth. In microbiology\, elemental sulfur has generally bee
 n assumed to take the form of either insoluble S8 or soluble polysulfide (
 Sn2-)/sulfide (S2-). In reality\, however\, sulfur can form a range of dif
 ferent allotropes and can come in the form of particles with very differen
 t sizes and characteristics\, the speciation of which can control availabi
 lity to microbes\, enzymes\, and abiotic reactants. We’ll discuss the wa
 ys in which sulfur may be made biologically available (and how we can dete
 ct those different forms of S)\, how enzymes that react with S-containing 
 compounds catalyze their chemistry\, and how one can analyze the complex m
 icrobial communities involved in reactions such as sulfur cycling.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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