NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,227 terms related to cancer and medicine.
We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.
- JAK2 gene
- listen (… jeen)
- A gene that makes a protein called JAK2, which sends signals in cells that promote cell growth. This protein helps control the number of red blood cells, white blood cells, and platelets that are made in the bone marrow. Mutated (changed) forms of the JAK gene have been found in some types of blood conditions, including polycythemia vera, essential thrombocythemia, and primary myelofibrosis. These changes may cause the body to make too many blood cells.