German: Marker
Japanese: マーカ

1. Physiology. A substance, such as hormone, enzyme or specific protein (e.g., tumormarker), that when present in abnormal amounts in the blood or tissue may indicate the presence of disease. A marker can also be a molecule (e.g., CD antigens) that is characteristic for a particular cell type. It is used in identification and eventually isolation of these cells.
2. Genetics. See marker gene.

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