What kind of Ig can pass placenta ()
A. IgG
B. IgA
C. IgM
D. IgD
E. IgE
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According to what can Ig be divided into 5 classes ()
A. H and L chains are all different
B. V regions are different
C. L chains are different
D. H chains are different
E. CL
B cells can recognize Ag specifically, because they have ()
A. IgG
B. IgA
C. IgM
D. IgD
E. mIgM
What kind of cells can produce IgE ()?
A. DC
B cell
C. T cell
D. NK
E. Macrophage
After the treatment of papain, IgG can be divided into ()
A. 2 Fab and Fc
B. F(ab')2 and pFc'
C. F(ab')2 and Fc
D. 2Fab and pFc'
E. Fab and Fc
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