Antibodies 101: Isotypes
Type
Blog Post
Published
Oct. 19, 2021, 1:15 p.m.
...and is found mostly in blood.
IgD
While IgD is coexpressed with IgM on the surface of most immature B cells...blood, where it’s the second most common antibody after IgG; but it's the most prevalent antibody in secretions...valency of two and has no subclasses.
IgG
IgG is the most abundant isotype in blood, but it’s also found in...where it protects mucosal membranes. This isotype is most commonly a dimer with a valency of four. There are...