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Calbindin-D28k, a key regulator of calcium homeostasis plays a cytoprotective role in various tissues. We used serum free (SFM) and charcoal stripped serum (csFBS) culture media as models of cellular stress to modulate calbindin D28k expression and identify regulatory cis-elements and trans-acting factors in kidney and beta cells. The murine calbindin-D28k promoter activity was significantly upregulated...
Understanding how signaling pathways are interconnected is vital for characterizing mechanisms of normal development and disease pathogenesis. In this issue, Van Wageningen et al. (2010) examine phosphorylation networks in Sacharromyces cerevisiae with genome-wide expression profiling to identify recurring themes in signaling redundancy.
Control of gene expression depends on a myriad of protein-DNA interactions, and the number of proteins involved just got larger. In this issue, Hu et al. (2009) identify hundreds of human proteins that bind to DNA, including many surprises such as the protein kinase ERK2 (MAPK1) that now appears to control gene expression directly.
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