Structure
Calmodulin is a small, highly conserved protein approximately 148 amino acids long (16706 Daltons). It contains four EF-hand motifs, each of which binds a Ca2+ ion. The protein has two approximately symmetrical globular domains (the N- and C-domain), separated by a flexible linker region. Calcium participates in an intracellular signalling system by acting as a diffusible second messenger to the initial stimuli.
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Famous quotes containing the word structure:
“It is difficult even to choose the adjective
For this blank cold, this sadness without cause.
The great structure has become a minor house.
No turban walks across the lessened floors.
The greenhouse never so badly needed paint.”
—Wallace Stevens (1879–1955)
“A structure becomes architectural, and not sculptural, when its elements no longer have their justification in nature.”
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“Just as a new scientific discovery manifests something that was already latent in the order of nature, and at the same time is logically related to the total structure of the existing science, so the new poem manifests something that was already latent in the order of words.”
—Northrop Frye (b. 1912)