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S-phase fraction
Pronunciation
Definition 1
A measure of the percentage of cells in a tumor that are in the phase of the cell cycle during which DNA is synthesized. The S-phase fraction may be used with the proliferative index to give a more complete understanding of how fast a tumor is growing. (NCI Dictionary)
Definition 2
The percentage of cells in a sample currently undergoing mitosis. (NCI Thesaurus)
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An allyl-S compound with the structure C=CCSSCC(N)C(O)O.
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