Alpha-keratin Alpha-keratin Alpha-keratin, or α-keratin, is a type of keratin found in mammals. This protein is the primary component in hairs, horns, nails and the epidermis layer of the skin. α-keratin is a fibrous structural protein, meaning it is made up of amino acids that form a repeating secondary structure. The secondary structure of α-keratin is very similar to that of a traditional protein α-helix and forms a coiled coil. Due to its tightly wound structure, it can function as one of the strongest biological materials and has various uses in mammals, from predatory claws to hair for warmth. α-keratin is
The Origin of Species (The Outer Limits) next sentient species to arise could suffer the same fate, they built the ship to save a sample of that race before it wiped itself out, and protect it until it could repopulate the Earth. The ship extracted genetic material from the group students (and Hope) during the journey and created babies (modifying their genetics to avoid the dangers of inbreeding), creating a sufficient number of humans with enough genetic variation to repopulate the Earth. The Origin of Species (The Outer Limits) "The Origin of Species" is an episode of "The Outer Limits" television show. It was first broadcast on