Further studies on the differences in serum dependence in EBV negative lymphoma lines and their in vitro EBV converted, virus-genome carrying sublines

Independently EBV-converted, viral genome carrying sublines of the originally EBV negative Ramos and BJAB lymphoma lines showed decreased serum dependence, in comparison with the progenitor lines. The virus negative lines could not grow in 10% dialysed FCS, unless reconstituted with the dialysate. The converted lines grew well on dialysed serum. Seeding of the EBV negative lines with larger inocula enabled them to "take off" on dialysed serum as well. The EBV converted lines were able to form colonies in soft agar, whereas the original negative lines failed to do so.