Actin biology, the core mechanism

The actin bank that powers cell movement

A cell cannot move, divide, or heal without rapidly rebuilding its actin cytoskeleton. Thymosin beta-4’s core job is to hold a reserve of free actin monomers and release them the instant a migratory signal arrives. Think of it as the cell’s actin savings account.

This unit explains G-actin versus F-actin, how sequestration works, and the central paradox of giving more of a protein the cell already keeps in huge supply.