An unusual sensitivity to certain foods, pollens, insect bites, etc. The sampling of amniotic fluid by inserting a hollow needle. The building blocks of protein. There are 20 common amino acid molecules that can be combined to form proteins in living things. The genetic code determines the sequence of amino acids in a protein, which governs the protein's function.
Enzymes are proteins.
Proteins produced by the immune system in response to the introduction of foreign molecules called antigens. Antibodies neutralize these molecules to prevent infection or disease. Substances such as toxins, enzymes or foreign molecules that cause an immune response by antibodies. The cultivation of plants using water as the support medium. It can also mean rearing marine life under controlled conditions in water, such as fish farming.