macroglobulin(redirected from a 2 -macroglobulin)
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a protein (globulin) of high molecular weight, in the range of 1,000,000; observed in the blood in a number of diseases.
α2-macroglobulin a plasma protein that inhibits a wide variety of proteolytic enzymes, including trypsin, plasmin, thrombin, kallikrein, and chymotrypsin, by entrapping and reducing the accessibility of their functional sites to large molecules. Written also alpha2-macroglobulin.
A plasma globulin of high molecular weight.