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Alpha 2-Macroglobulin (a2M), is a approximately 720-kDa homotetrameric glycoprotein composed of four identical approximately 180 kDa subunits. aAlpha 2M shares with other alpha-macroglobulins, like the complement components C3 and C4 and the pregnancy zone protein PZP, an extraordinary binding capacity for a variety of ligands. This allows the alpha-macroglobulins to serve as humoral defense barriers against foreign peptides in the plasma. Alpha 2M interacts and captures virtually any proteinase, often referred to as a panprotease inhibitor. In the brain of Alzheimer's disease (AD) patients, Alpha 2M also has been localized to diffuse amyloid plaques, supporting an important role for alpha 2M in AD etiopathology.
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Protein Aliases: A2mp; Alpha 2 M; Alpha-2-M; Alpha-2-M (A2M); Alpha-2-macroglobulin; Alpha-2-macroglobulin-P; C3 and PZP-like alpha-2-macroglobulin domain-containing protein 5; DKFZp779B086; S863 7
Gene Aliases: A2M; A2m1; A2maa; A2MAC1; A2MD; A2mp; CPAMD5; FWP007; Mam; S863-7
UniProt ID: (Human) P01023, (Mouse) Q6GQT1, (Rat) P06238
Entrez Gene ID: (Human) 2, (Mouse) 232345, (Rat) 24153
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