Words similar to stage-dependent
Example sentences for: stage-dependent
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One of the major cellular serine/threonine protein phosphatases is protein phosphatase type 1 (PP1) [ 1 ] . An abundant enzyme expressed in all cells, complex regulation of PP1 is thought to be essential for proper temporal and spatial regulation of PP1 catalytic activity towards individual substrates [ 2 ] . Three different isotypes of the catalytic subunit, designated PP1α, PP1δ, and PP1γ1, are expressed in many different cell types [ 3 ] . Studies employing many eukaryotic systems all point to a crucial role for PP1 activity in controlling cell cycle progression, and an absolute requirement of this activity for mitotic exit [ 4 5 6 7 ] . There is also evidence to suggest that phosphorylation of PP1 and its associated proteins by the cyclin-dependent kinases may regulate PP1 activity in a cell cycle stage-dependent manner [ 8 9 10 ] . Hence, current efforts are directed towards identification of cell cycle-dependent substrates for PP1, and how regulation of PP1 activity towards these substrates controls the cell division cycle.
Thymocyte development occurs within a complex network of cells, extracellular matrix, and secreted factors referred to as the thymic microenvironment [ 1 ] . Current evidence suggests that this microenvironment is created during fetal thymus organogenesis through stage-dependent interactions between differentiating thymic epithelial cells (TECs) and developing thymocytes [ 2 3 4 5 6 ] . Therefore, blocks at different stages of thymocyte development result in differential effects on TEC differentiation and function.
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