Proteins are made of and the sequence of these determine how the protein will fold up and take shape, which ultimately determines it's function.

Proteins are made of smaller building blocks called amino acids.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey