- Glycoproteins present in the blood (antibodies) and in other tissue. They are classified by structure and activity into five classes (immunoglobulin A; immunoglobulin D; immunoglobulin E; immunoglobulin G; immunoglobulin M).
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- A protein that acts as an antibody.
Definition from: Physician Data Query via Unified Medical Language System at the National Library of Medicine
Related discussion in the Handbook
See also Understanding Medical Terminology.