[fos-fer-uh-leyt, fos-fawr-uh-, -for-]
verb (used with object), phosphorylated, phosphorylating. Chemistry.
to introduce the phosphoryl group into (an organic compound).

1930–35; phosphor- + -yl + -ate1

phosphorylation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
phosphorylation (ˌfɒsfərɪˈleɪʃən)
the chemical or enzymic introduction into a compound of a phosphoryl group (a trivalent radical of phosphorus and oxygen)

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American Heritage
Medical Dictionary

phosphorylation phos·pho·ryl·a·tion (fŏs'fər-ə-lā'shən)
The addition of phosphate to an organic compound through the action of a phosphorylase or kinase.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
phosphorylation   (fŏs'fər-ə-lā'shən)  Pronunciation Key 
The addition of a phosphate group to an organic molecule. Phosphorylation is important for many processes in living cells. ATP is formed during cell respiration from ADP by phosphorylation, as in the mitochondria of eukaryotic cells (oxidative phosphorylation) and the chloroplasts of plant cells (photosynthetic phosphorylation). Phosphorylation also regulates the activity of proteins, such as enzymes, which are often activated by the addition of a phosphate group and deactivated by its removal (called dephosphorylation).
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Encyclopedia Britannica


in chemistry, the addition of a phosphoryl group (PO32-) to an organic compound. The process by which much of the energy in foods is conserved and made available to the cell is called oxidative phosphorylation (see cellular respiration). The process by which green plants convert light energy to chemical energy is called photophosphorylation (see photosynthesis).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
In non-dividing cells such as neurons and muscle cells, it is possible that certain phosphorylation patterns could be more stable.
At the heart of this paradox is a process called oxidative phosphorylation, by which cells produce energy.
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