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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

The alpha subunit of initiation factor 2 is phosphorylated in vivo in the yeast Saccharomyces cerevisiae.

The phosphorylation state of the alpha subunit of initiation factor 2 (eIF-2 alpha) in Saccharomyces cerevisiae has been determined by two-dimensional gel electrophoresis and autoradiography of lysates from cultures grown under a variety of conditions. The alpha subunit was maintained in a phosphorylated state during logarithmic growth on fermentable and nonfermentable carbon sources, during starvation for an essential amino acid, during heat shock, during stationary phase, and during sporulation. Only when cells were starved for a carbon source for 2 h in 1 M sorbitol was eIF-2 alpha isolated in the nonphosphorylated state. This is in contrast with the studies in rabbit reticulocyte lysates, in which arrested protein synthesis was correlated with a relative increase in the extent of phosphorylation of eIF-2 alpha.[1]

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