Thus, we have identified the 17-bp component of the linker for the CDK5RAP2-PDGFRα fusion gene in a chronic eosinophilic leukemia patient as a homologous sequence in Marinobacter sp. Hb8, R. fascians D188, Rhodococcus sp. Here, PDGFRA is linked to Chronic Eosinophilic Leukemia, Not Otherwise Specified.