![]() Antigen Binding site or region: It is the place where the antigen comes and binds.Ģ. We can divide the IgG molecule into two central regions based on their functioning:ġ. Due to this, the resulting tetramer generates a Y-shaped structure having two identical halves. Heavy and light chains link with the disulphide bridging. Two of the heavy γ (gamma) chains (50 kDa) are identical. It has a tetrameric quaternary structure that consists of four peptide chains. Immunoglobulin G is a giant globular proteinaceous molecule with an average weight of 150 kDa. As it passes to the baby via the mother, can cause a pathological condition known as erythroblastosis fetalis.This immunity helps him to defend against the infection. ![]() ![]() IgG gained from the mother offers natural passive immunity to the baby. Here, a baby’s immune system is not very developed, making them more susceptible to diseases. ![]() Thus, it becomes the initial protector of the baby after the first six months after birth.
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