To confirm this finding and to determine whether fully transformed PCTs still retained a requirement for the v-Abl kinase that accelerated its appearance, cell survival analysis was performed after treatment of tissue culture lines of ABPC 20, ABPC 22, TEPC 1165, TEPC 2027 and pre B v-Abl lymphoma with 0.1 to 2.0 μM STI-571, an Abl kinase inhibitor [27]. Here, ABL1 is linked to lymphoma.