a fusion gene in acute lymphoblastic leukemia & involved in leukemogenesis; In leukemic cells both reciprocal fusion transcripts, ETV6/TTL and TTL/ETV6, were expressed; the predominant fusion transcript, TTL/ETV6 encodes a predicted 530 aa fusion protein containing 89 aa of the N-terminal TTL fusing to the helix-loop-helix domain and ETS-binding domain of ETV6
