Diagram of elastin molecules and their interaction, a. Elastin molecules are depicted in their individual and random-coiled conformation. The configuration of the individual molecules continuously changes, oscillating from one form to another, b. Elastin molecules are shown joined by covalent bonding (red) to form a cross-linked network, c. The effect of stretching is shown. When the force is withdrawn, the network reverts to the relaxed state as in panel b. (Copyright 1997 from Essential Cell Biology by Bruce Alberts, et al, p. 153. Modified with permission of Routledge, Inc., part of The Taylor & Francis Group.)
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