NCIt definition : Any of the structurally related glycoproteins that function as antibodies. They are
divided into five classes (IGA, IGD, IGE, IGG, IGM) on the basis of structure and
biological activity.;
Alternative definition : NCI-GLOSS: A protein that acts as an antibody. Immunoglobulins are made by B cells
and plasma cells. An Ig is a type of glycoprotein with two heavy chains and two light
chains.;
Codes from synonyms : CDR0000045725; CDR0000633917;