Slamf1 (Signaling lymphocytic activation molecule family member 1), Snca (Synuclein alpha) and Btbd14a (BTB/POZ domain containing 14A) are higher expressed in the erythroleukaemias and lower in the megakaryoblastic leukaemias but were also amplified in other types of leukaemias. The gene discussed is SLAMF1; the disease is leukemia.