Receptors can bind an extracellular molecule (triangle), and this activates an intracellular process. Enzymes in the membrane can do the same thing they do in the cytoplasm of a cell: transform a ...

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 ...

2 Keele University School of Medicine, Trauma and Orthopaedics, Hartshill, UK Correspondence to: Professor Maffulli Keele University School of Medicine, Trauma and Orthopaedics, Thornburrow Drive, ...