tokens: Fas resistant DT-40 lymphoma B-cells rendered BTK deficient through targeted disruption of the btk gene by homologous recombination knockout underwent apoptosis after Fas ligation , but wild-type DT-40 cells or BTK deficient DT-40 cells reconstituted with wild-type human btk gene did not .
folded_tokens: fa resistant dt-40 lymphoma b-cell render BTK deficient through target disruption of the btk gene by homologous recombination knockout undergo apoptosis after fa ligation , but wild-type dt-40 cell or btk deficient dt-40 cell reconstitute with wild-type human btk gene do not .