in order to assess the involvement of the 13q14 region in the development of osteosarcoma , both osteosarcoma tumor cells and normal tissue from a retinoblastoma patient previously used in restriction fragment length polymorphism studies , and sarcoma cells and normal fibroblasts from other tumor patients , have been investigated with respect to esterase d ( e.c . 3.1.1.1 ) expression and chromosome pattern .
C0007634
cells
C0016030
fibroblasts