this was established from the tumors directly and from tissue culture cell lines derived from the tumor using a variety of assays : e.g. , no [ 3h ] hypoxanthine uptake into tumor or tissue culture cells , no conversion of [ 3h ] hypoxanthine to [ 3h ] imp by cell extracts from tumors or tissue culture cells , no growth of tissue culture cells in hypoxanthine : aminopterin : thymidine medium , and normal growth of these cells in 10 microm 6-mercaptopurine .
C0007634
cells
C0007595
normal growth