molecular marker

Definition / meaning of molecular marker

A biological molecule found in blood, other body fluids, or tissues that is a sign of a normal or abnormal process, or of a condition or disease. A molecular marker may be used to see how well the body responds to a treatment for a disease or condition. Also called biomarker and signature molecule.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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