Alpha-keratin higher level of force before fracture. On the other hand, soft alpha-keratins, such as ones found in the skin, contain a comparatively smaller amount of disulfide bonds, making their structure more flexible. 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
History of removal of leg and underarm hair in the United States justification for the sudden need to remove underarm hair, and later leg hair. The message was distributed primarily and heavily through the newly-born, popular and influential women's magazines. The Delineator, first published in 1873, was the first women's magazine. Five others appeared soon after, comprising what became known as the "Big Six": Ladies' Home Journal, Woman's Home Companion, Good Housekeeping, McCall's, and Pictorial Review. The publisher of the Ladies Home Journal, Cyrus Curtis, told advertisers that the purpose of the magazine was to give manufacturers a way to market their products to women, not for the benefit of American women.