plasma autoantibody titer plasma anti-rat type 2 collagen autoantibody level plasma anti-rat type 2 collagen antibody titer plasma anti-rat type 2 collagen autoantibody titer 2014-11-11T17:43:45Z A measurement of the amount of an immunoglobulin molecule produced by the immune system of a rat and possessing a specific amino acid sequence that binds its own type 2 collagen, the main fibrous protein constituent of cartilage, in a specified sample of plasma, expressed as the last dilution of plasma at which a positive result could be obtained. CMO:0002643 JSmith clinical_measurement_ontology plasma anti-rat type II collagen autoantibody titer plasma rat anti-self type 2 collagen antibody titer