ELISA technique is based on the principles of antigen-antibody interaction. Can this technique be used in the molecular diagnosis of a genetic disorder, such as phenylketonuria?
Yes. One can use an antibody against the enzyme (that is responsible for the metabolism of phenylalanine) to develop ELISA based is a diagnostic technique. The patient where the enzyme protein is absent would give a negative result in ELISA when compared to a normal individual.