Globulin (GLOB)

Globulins are a heterogeneous group of serum proteins that are essential for various physiological functions, including the immune response, blood coagulation, and the transport of hormones, lipids, and metal ions [StatPearls, https://www.ncbi.nlm.nih.gov/books/NBK554417/]. They are classified into alpha-1, alpha-2, beta, and gamma fractions based on their electrophoretic mobility, with the gamma fraction primarily composed of immunoglobulins (antibodies) [Britannica, https://www.britannica.com/science/globulin]. In clinical practice, globulin levels are monitored via serum protein electrophoresis to diagnose conditions such as liver disease, kidney dysfunction, and plasma cell dyscrasias like multiple myeloma [MedlinePlus, https://medlineplus.gov/lab-tests/globulin-test/]. While specific globulins like Sex Hormone-Binding Globulin (SHBG) or Thyroxine-Binding Globulin (TBG) are targeted or monitored in specific endocrine contexts, the term 'globulin' itself refers to a broad protein class rather than a single therapeutic target [StatPearls, https://www.ncbi.nlm.nih.gov/books/NBK554417/]. Therapeutic interventions involving globulins often utilize purified immunoglobulin fractions (e.g., IVIG) to provide passive immunity or modulate immune activity in autoimmune diseases [NIH, https://www.ncbi.nlm.nih.gov/books/NBK548313/].

Other names

Serum globulinPlasma globulinTotal globulin

Globulins function as antibodies that neutralize pathogens (gamma globulins), as transport proteins for hormones and lipids (alpha and beta globulins), and as enzymes or protease inhibitors in the blood [StatPearls, https://www.ncbi.nlm.nih.gov/books/NBK554417/].