What kind of Ig is used for early diagnosis of infection ()
A. IgG
B. IgA
C. IgM
D. IgD
E. IgE
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How many classes of immunoglobulins are there ()
A. 5
B. 6
C. 7
D. 4
E. 10
Which Ig has no hinge region ()
A. IgG
B. IgA
C. IgM
D. IgD
E. sIgA
The antigen binding region of IgM is formed by the following domains ()
A. VH+VL
B. CH+CL
C. Hinge region
D. VH
E. CL
Components participating in the classical activation pathway is ()
A. C1q
B. IgG4
C. IL-2
D. H factor
E. B factor