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Fig. 3. Overexpression of p50 alters mitochondrial morphology and ultrastructure. Transmission electron micrographs of p50-expressing HeLa cell cross-sections at high magnification show unusually branched (A) or elongated (B) morphology of the mitochondria. Arrowhead in A indicates the branching of mitochondria; Arrowheads in B indicate a single mitochondrion of
10 µm in length. Notice the dramatic loss of cisternae in the mitochondria marked with an asterisk in A.