Asker's rating. 1  Shackles are brackets installed on the rear leaf springs it causes the rear of the car to be raised giving the car that classic Muscle look. 2  useing a larger shackle will raise the rear of the car allowing slightly bigger tires in the rear. 3  Shackled Means.
Clinical Significance. A synthetic circular peptide containing citrulline called CCP IgG (cyclic citrullinated peptide) has been found to be better at discriminating Rheumatoid Arthritis patients from other patients than either the perinuclear autoantibody test or the test for rheumatoid factor.
The IgG class of antibodies is composed of four different subtypes of IgG molecules called the IgG subclasses. These are designated IgG1, IgG2, IgG3 and IgG4. Patients with persistently low levels of one or two IgG subclasses and a normal total IgG level have a selective IgG subclass deficiency.