Thin and thick sections of both physiologically active and physiologically passive iridophores from a range of vertebrate species have been examined by electron microscopy at 60 kV and at 1,000 kV. All iridophores studied have been found to contain 65-Å filaments linking successive crystals in their parallel stacks; their orientation in the cell is shown in stereo pairs of 0.25-µm sections obtained from high voltage microscopy. In addition, several of the physiologically passive iridophores contain 100-Å filaments in varying numbers. It is suggested that the thin filaments might be iridophore actin and play a role in the movement of iridophore components, and that the 100-Å filaments might play a cytoskeletal role in the iridophores in which they occur.
FINE STRUCTURAL DEMONSTRATION OF ORDERED ARRAYS OF CYTOPLASMIC FILAMENTS IN VERTEBRATE IRIDOPHORES : A Comparative Survey
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Susannah T. Rohrlich; FINE STRUCTURAL DEMONSTRATION OF ORDERED ARRAYS OF CYTOPLASMIC FILAMENTS IN VERTEBRATE IRIDOPHORES : A Comparative Survey . J Cell Biol 1 August 1974; 62 (2): 295–304. doi: https://doi.org/10.1083/jcb.62.2.295
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