Figure 1

BMF oncocytomas lack complex I. Representative immunohistochemistry of tissue sections containing normal (N) and oncocytic tissue (T) for subunits of respiratory chain complex I (NDUFB8; a) and complex IV (COXIV; b). (c) Overlap of a and b. Magnification: × 50. (d) Sequence electropherogram showing frameshift mutation m.3571insC in sample BMF4.