What is the difference between IgM and IgG?

IgM or Immunoglobulin M refers to the antibody that is present in the blood, particularly in the lymph fluid, which protects the human body against in the invasion of certain antigens, or when an individual is exposed to a particular disease. This antibody is produced by the body immediately; it senses the invasion of a particular disease.

IgG or immunoglobulin G is the antibody produced by the body to protect the human body against viral and bacterial attacks. It is present in abundance in the body system. It does not offer immediate protection against diseases but can offer immunity after some time so that an individual won't be susceptible to that disease again. When a particular disease invades the body system, IgM is activated to combat it, after which IgM is developed by the body system to give immunity. Unlike IgG that offers long-term protection against diseases, IgM does not.

Immunoglobin M (IgM) and Immunoglobin G (IgG) are both antibodies IgM is a pentameric molecule that occurs in the early stage of infection, and it has ten antigen-binding sites. IgG is a monomeric molecule that exists at later infection and has two antigen-binding locations, and this is a significant difference between the two. Immunoglobin (Ig), on the other hand, is also referred to as an antibody, which is a kind of protein blood cells of the immune system to respond against the infections caused by bacteria.

IgM is the first form of antibody made in the body as the first retort to an infection by the immune system. It is the biggest antibody found in the body than any other antibodies. IgM is responsible for the early extermination of the antigen and influence over the infection.