85%/15% cotton/nylon. Unisex. One size fits all. GI Government Issued style. Made In USA. Thermal boot socks. Keeps your feet warm in extremely cold weather. Great for outdoor activities and could be worn around the house to keep feet warm. HW-Heavy Weight. Comfortable fit.
1 contribute to the mechanical structure of animals, including humans, e.g. keratin in hair and fingernails, and fibrous proteins such as collagen in tendons. 2  enable animals to move, e.g. myosin in muscle.  facilitate transport of smaller molecules around animals' bodies, e.g. haemoglobin.
There are two basic types of transmembrane proteins: alpha-helical and beta-barrels. Alpha-helical proteins are present in the inner membranes of bacterial cells or the plasma membrane of eukaryotes, and sometimes in the outer membranes. This is the major category of transmembrane proteins. In humans, 27% of all proteins have been estimated to be alpha-helical membrane proteins.