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Phosphorylation of substrate proteins by mitogen-activated protein kinases (MPKs) determines the specific cellular responses elicited by a particular extracellular stimulus. However, downstream targets of plant MPKs remain poorly characterized. In this study, 29 putative substrates of AtMPK3, AtMPK4 and AtMPK6 were identified by solid-phase phosphorylation screening of a λ phage expression library...
Adipogenesis, or the conversion of proliferating preadipocytes into nondividing adipocytes, is an important part of the vertebrate weight-maintenance program. It is not yet understood how and when an irreversible transition occurs into a distinct state capable of accumulating lipid. Here, we use single-cell fluorescence imaging to show that an all-or-none switch is induced before lipid accumulation...
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