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 four types of protein structure: 1  Primary Structure: sequence of amino acids in the chain. 2  Secondary Structure: the shape of the protein molecule caused by hydrogen-bonding between -C=O and -N-H groups within the chain. 3  Tertiary Structure: the interaction between R-groups that causes folding and bending.