Because membrane receptors interact with both extracellular signals and ... reactions control the activity of many enzymes involved in intracellular signaling pathways. Specifically, the addition ...

Proteins also receive signals from outside the cell and mobilize intracellular ... extracellular matrix or are involved in intercellular communication. Cells rely on thousands of different enzymes ...

A team of researchers led by the University of California San Diego and Stanford University has developed a noninvasive method to monitor the electrical activity inside heart muscle cells from the ...