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In some of the industrialized countries of the world, governments are concerned about population shrinkage.
Protein Kinase A
An enzyme that transfers phosphate groups from ATP to specific proteins, playing a key role in the regulation of cellular processes.
Tyrosine Kinases
A family of enzymes that catalyze the transfer of a phosphate group from ATP to a tyrosine residue in a protein, playing key roles in signal transduction pathways.
Enzyme-Linked Receptors
A class of membrane receptors that, when bound to a ligand, activate an intrinsic enzyme activity, leading to a cellular response.
G Protein
A family of proteins that act as molecular switches inside cells, involved in transmitting signals from various stimuli outside a cell to its interior.
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