The branch of the U.S. government that is composed of the president and all the individuals, agencies, and departments that report to the president, and that is responsible for administering and enforcing the laws that Congress passes.
Proteins are biological polymers composed of amino acids. Amino acids, linked together by peptide bonds, form a polypeptide chain. One or more polypeptide chains twisted into a 3-D shape form a protein. Proteins have complex shapes that include various folds, loops, and curves.
Amino acids are molecules which contain both a carboxylic acid and an amine group. In amino acid, the carboxyl group is more acidic than the carboxylic acid. 2-amino acids, also known as alpha-amino acids, are a specific type of amino acid that makes up proteins.ll proteins or polypeptides are a series of linked amino acids. A typical Î± amino acid consists of a central carbon (which is the alpha carbon in this case) that is attached to an amino group (-NH2), a carboxylic acid (-COOH), a hydrogen atom, and a distinctive R group.