A gamma-globulin factor in the serum of patients with systemic lupus erythematosus that reacts with isolated cell nuclei 1 or nucleoprotein 2,3 has been detected in many ways. 4 The standard method of ...

Complement component 3, often called C3, is an essential protein of the immune system. This protein plays a vital role in the body’s innate immune system, providing: the first line of defense against ...

Serra, Guarini et al. 1 suggested in 1958 a peculiar complement-fixation test as a very selective serological technique for identifying the blood sera of carriers of malignant tumours. You have full ...

THE antigen most commonly used in complement fixation tests for Johne's disease is a suspension of the specific organism, Mycobacterium johnei. This form of antigen is not entirely satisfactory for ...