Answer:
Integrins.
Step-by-step explanation:
Integrins may be defined as the transmembrane ligand that activates the signal transduction pathway by binding with its receptor. Integrins is present in all animal cells.
Integrins helps in the direct communication of the cell with the extracellular matrix. The specific gene expression occur in liver and testes. Integrins are involved in the induction of the cell and their communication with the extracellular matrix.
Thus, the answer is integrin.