Carbohydrate Chains Attached to the C_H2 Domains of IgA, IgD

Multiple Choice

Carbohydrate chains attached to the C_H2 domains of IgA, IgD, and IgG are believed to

A) allow for closer contact between partner chains.
B) confer stability to the molecule resulting in a higher desaturation temperature.
C) prevent protease degradation.
D) provide space for complement protein binding.
E) increase binding affinity for antigen.