Cdc7 is not an extracellular signal used to control the arrangement of actin filaments.
What is actin filament?
Actin filaments (F-actin) are linear polymers of globular actin (G-actin) subunits that are found as thin filaments in muscle and non-muscle cells and as microfilaments in the cytoskeleton.
Strength, connections to other cells and the extracellular matrix, lanes for intracellular transport, and a structure for generating force are all provided by actin filaments. Actin polymerization and contractility are regulated by a multitude of signal transduction mechanisms that have recently been discovered.
The CDC7 gene in humans encodes a protein kinase that is connected to cell division cycle 7. At the time of chromosomal DNA replication, the Cdc7 kinase is engaged in cell cycle regulation.
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