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.
Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. sliding filament theory A proposed mechanism of muscle contraction in which the actin and myosin filaments of striated muscle slide over each other to shorten the length of the muscle fibres (see sarcomere).