What are the similarities between IGA and IGG?

IGA and IGG are types of antibodies produced in the body as a secondary immune response. Both are crucial components of the humoral immune system and play key roles in fighting against bacterial and viral pathogens.  

IGA and IGG are both synthesized by activated plasma cells in response to antigen or antigenic markers produced in pathogenic antigens. Both are highly specific and bind to a specific epitope of a pathogenic antigen.

IGA and IGG are both large glycoproteins made up of four polypeptide chains – 2 heavy chains and 2 light chains – composed in a Y shape. They contain specialized regions known as paratopes at which they bind to the specific epitope of a pathogenic antigen.