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Representative electron microscopic analysis of GRX cells. Typical ultrastructural features of GRX cells are depicted including (A) overview of cell structure, (B) dense nucleus, (C) mitochondria and intracellular fat droplets, (D) intracellular retroviruses, and (E,F) retroviral particles at cell border. Magnifications: (A) 6000×, (B–F) 21,560×.
