from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white crystalline amino acid, C9H11NO3, that is obtained from the hydrolysis of proteins such as casein and is a precursor of epinephrine, thyroxine, and melanin.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A nonessential amino acid C9H11NO3 found in most animal proteins, especially casein.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an amino acid found in most proteins; a precursor of several hormones
Then it moves sugar into cells by activating an enzyme called tyrosine-kinase.
The parasite infects the brain by forming a cyst within its cells and produces an enzyme called tyrosine hydroxylase, which is needed to make dopamine.
Btk is a type of enzyme known as a tyrosine kinase inside B-cells that plays an early key role in B-cell activation.
Gleevec clamps down on the cell's accelerator, a protein called tyrosine kinase, which drives cancer to reproduce.
So-called tyrosine kinase inhibitor drugs such as imatinib, marketed by Swiss drugmaker Novartis as Glivec or Gleevec, and dasatinib, sold by Bristol-Myers Squibb as Sprycel, have transformed treatment of CML and are credited with turning it from a fatal cancer into a manageable condition.
When a leukemia drug was used in turn to block the enzyme - called tyrosine kinase c-Abl - it prevented destruction of those healthy cells.
Protein contains tyrosine, which is converted into the alertness neurotransmitter, dopamine.
Both of these older drugs, respectively known generically as dasatinib and nilotinib, are members of a class called tyrosine kinase inhibitors.
But by the 1990s, at Sugen, he was doing something very different, developing cancer-fighting pills that work by blocking enzymes called tyrosine kinases that cells use to communicate with one another.
For example, if the tumor being tested has certain types of EGFR mutations and does not have a K-RAS mutation, the oncologist may decide to treat the patient with a class of drugs called tyrosine kinase inhibitors.
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