a freeze-etch study of nuclear pores performed on human lymphocytes , epidermal and corneal cells , on hamster fibroblasts , on rat and hamster sarcoma cells and cells from a human malignant melanoma , revealed that the frequency of pores as a part of very important biological cellular structures increases in proliferating cells , and that there is a statistically significand difference between normal and tumor cells .
C0028587
nuclear pores
C0007634
cells