To confirm the absence of mRNA expression of them, Burkitt’s lymphoma cell line Daudi (catalog number: JCRB9071) and histiocytic lymphoma cell line U937 (catalog number: JCRB9021) were used as positive controls for Fgr, Blk and Hck and conventional RT-PCR was performed. Here, FGR is linked to reticulum cell sarcoma.