Semantic resources project/Antibodies/Revised Methods/Magnetic Immunoassay

Description
MIA: Magentic Immunoassay

Outline
An immunoassay involving magnetic beads, which are bound to either the antigenic substance of the antibody, and render the bound form detectable by means of a magnetometer.

Ontology References
None, as far as I can tell.

Usage
Chemla et al. "Ultrasensitive magnetic biosensor for homogeneous immunoassay". PNAS 97:26,14268-14272. (December 2000) "'A substantial advantage of the magnetic relaxation remanence immunoassay is that it can distinguish between bound and unbound magnetic labels. As demonstrated in our experiments, we are able to perform homogeneous assays, in which the labels are left in suspension together with the targets. This method obviates the need for time-consuming wash steps, which are necessary in most other techniques.'"

Definition
My first attempt: An immunoassay in which a magnetic nanoparticle is attached to either the antibody or the antigenic substance. The presence of this nanoparticle is then detected by the use of a magnetometer.