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.
By Anne Marie Helmenstine, Ph.D. Proteins are biological polymers, constructed from amino acids joined together to form peptides. Peptides subunits may bond with other peptides to form more complex structures. Multiple types of chemical bonds hold proteins together and bind them to other molecules. Here is a look at the chemical bonds responsible for protein structure. 1  Primary Structure (peptide bonds) - The primary structure of a protein consists of amino acids chained to each other. 2  Amino acids are joined by peptide bonds.