Enzyme-Linked Immunosorbent Assay (ELISA)
A biochemical technique to detect the presence of an antibody or an antigen in a sample. It is commonly used to detect infectious agents.
The many proteins produced by organisms to act as biochemical catalysts. Enzymes are the mediators of cell metabolism.
Epidermal Growth Factor Receptor (EGFR)
A cell-surface receptor that is activated when bound by epidermal growth factor. Genetic mutations that lead to EGFR overexpression or overactivity have been associated with a number of cancers.
Proteins found outside of a cell.