actin one of the proteins into which actomyosin can be split can exist in either a globular or a fibrous form actomyosin a protein complex in muscle fibers composed of myosin and actin shortens when stimulated and causes muscle contractions
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Amethyst is Silicon dioxide (SiO2) .   When the word amethyst is used the only color that comes to one's mind is purple. Its color is due the presence of iron mineral in it â¦ . The color may range from a faint mauve to a glorious purple. The clear dark purple color is the one that is in most demand.