Sable. The sable is a species of marten which inhabits forest environments, primarily in Russia from the Ural Mountains throughout Siberia, eastern Kazakhstan, northern Mongolia, China, North and South Korea and HokkaidÅ in Japan.able. The sable is a species of marten which inhabits forest environments, primarily in Russia from the Ural Mountains throughout Siberia, eastern Kazakhstan, northern Mongolia, China, North and South Korea and HokkaidÅ in Japan.
Intermediate filament s are one component of the cytoskeleton-important structural components of living cells. Their size is intermediate between that of microfilament s and microtubules. They are assembled from several different proteins.
Microfilaments. The microfilament system is a network of filaments 6 nanometers (nm) in diameter that are important for anchoring plasma membrane proteins, for producing cell movement, and for cell division. The base filament is composed of a protein called actin that is 42 kilodaltons (kd) in weight.nlike the other systems, which are composed of one or two different proteins, intermediate filaments can be formed by a relatively large number of different proteins. For example, the primary intermediate filaments found in epithelial cells (such as skin) are formed from pairs of keratins, one basic and one acidic.