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
Rite of Passage (The Outer Limits) extinct when the aliens found Earth, and have taken it upon themselves to restore life wherever it has vanished. Shal and Brav's child is the first human born naturally in centuries. They are given back their son and return to the commune. Rite of Passage (The Outer Limits) "Rite of Passage" is an episode of "The Outer Limits" television show. It was first broadcast on March 13, 1998, during the fourth season. The birth of a child is a joyful event, but for Shal and Brav, two young naive humans who live in a small commune in the woods, it