proteins act like molecular swivels or molecular hinges

An example of a similes used in explaining science:

"'Binding of the spectrin lattice to the cytoplasmic domains of the transmembrane proteins is mediated primarily by two multifunctional proteins, protein 4.1R and Ankyrin…. Each of these molecules has separate binding regions for the cytoplasmic domains of transmembrane proteins and for the spectrin-actin cytoskeleton. They thus provide strong yet flexible attachment, much like "molecular swivels" or "molecular hinges," conferring the freedom of motion needed for the twisting or sliding of the cytoskeleton across the inner surfaces of the phospholipid bilayer when the cells are distorted by shear stress and stretched or shrivelled by osmotic changes."

Benz, Edward J. (2018) Anemias, Red Cells, and the Essential Elements of Red Cell Homeostasis, in Edward J. Benz, Nancy Berliner, & Fred J. Schiffman, Anemia. Pathophysiology, Diagnosis, and Management, Cambridge University Press, 1-13.

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Author: Keith

Former school and college science teacher, teacher educator, research supervisor, and research methods lecturer. Emeritus Professor of Science Education at the University of Cambridge.