All enzymes, the metabolic workers of the cell, are protein. Structures, such as cytoskeletons, are protein. Integrin proteins that span the cell membrane and do the work of transport across this membrane are protein, generally. So, with out protein there… Full Answer
One reason is enzymes. Without enzymes cellular reaction would be too slow to sustain life. Another reason is construction. Proteins are excellent construction materials used throughout the cell. Integrin proteins in the plasma membrane facilitating active and passive transport.
Many cells bind to components of the extracellular matrix. This cell-to-ECM adhesion is regulated by specific cell surfacecellular adhesion molecules (CAM) known as integrins. Integrins are cell surface proteins that bind cells to ECM structures, such as fibronectin and laminin… Full Answer
The protein, an integrin protein, can be a channel protein, such as an aquaporin, and just have a hydrophyllic interior so substances can come down their concentration gradient, such as water, and cross the membrane that way. A protein can… Full Answer
And you thought you knew all there was to know about fertilization… The enormous population growth and high incidence of infertility in humans demand a fuller appreciation of the mechanisms that govern fertilization. But although the principle cellular events of… Full Answer
Tissue in the human body: Epithelial: Is made of cells arranged in a continuous sheet with one or more layers, has apical & basal surfaces. A basement membrane is the attachment between the basal surface of the cell & the… Full Answer