ABL1 and chronic leukemia: For example, in acute and chronic leukemias and non-Hodgkin’s lymphoma, fusion tyrosine kinases (FTKs) such as BCR–ABL, TEL–ABL, TEL–JAK2, TEL–PDGFβR, TEL–TRKC(L), and NPM–ALK are generated by chromosomal translocations [73,74,75].