In this high magnification
image of a longitudinal section of skeletal muscle stained with iron hematoxylin,
the muscle proteins are stained black, revealing cross
striations (arrow), formed by the alignment of the sarcomeres in adjacent
myofibrils. The DNA and RNA in the oval-shaped muscle cell
nuclei, located at the outer edge of the cell under the plasma membrane,
are also stained black by iron hematoxylin.
