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any of a large family of proteinsprotein,
any of the group of highly complex organic compounds found in all living cells and comprising the most abundant class of all biological molecules. Protein comprises approximately 50% of cellular dry weight.
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 of a spherical or globular shape that are widely distributed throughout the plant and animal kingdoms. Many of them have been prepared in pure crystalline form. The term globulin is a partly procedural one, used in classifying an otherwise diverse group of proteins that are soluble in water or dilute salt solutions. Among the most important are the immunoglobulins (Ig), the antibodies of the immune system (see immunityimmunity,
ability of an organism to resist disease by identifying and destroying foreign substances or organisms. Although all animals have some immune capabilities, little is known about nonmammalian immunity.
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). They are classified into five types based upon structure: IgA, IgD, IgE, IgG, and IgM. IgG or &ggr;-globulin is the most common and forms about 70% of the immunoglobins in the blood. Other globulins are involved in the transport of a variety of substances, including lipidslipids,
a broad class of organic products found in living systems. Most are insoluble in water but soluble in nonpolar solvents. The definition excludes the mineral oils and other petroleum products obtained from fossil material.
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, hormoneshormone,
secretory substance carried from one gland or organ of the body via the bloodstream to more or less specific tissues, where it exerts some influence upon the metabolism of the target tissue.
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, and inorganic ions.


A general name for any member of a heterogeneous group of serum proteins precipitated by 50% saturated ammonium sulfate. See Protein, Serum

The introduction of electrophoresis during the 1930s permitted subdivision of the globulins into alpha, beta, and gamma globulins on the basis of relative mobility at alkaline pH (8.6). However, each of these subgroups, though electrophoretically homogeneous, consists of a great variety of proteins with different biological properties and markedly different sizes and chemical properties other than net charge. Thus the α2-globulins, for example, as defined by moving boundary or paper electrophoresis, contain proteins ranging in molecular weight from approximately 50,000 to approximately 1,000,000 (α2-macroglobulin), each with differing functions. See Immunoglobulin


A heat-labile serum protein precipitated by 50% saturated ammonium sulfate and soluble in dilute salt solutions.


any of a group of simple proteins, including gamma globulin, that are generally insoluble in water but soluble in salt solutions and coagulated by heat
References in periodicals archive ?
The merger transaction is designed to be effected as a tax-free reorganization for eStara stock holders and is expected to be accounted for by ATG under the purchase method of accounting.
All of the finalists and winners of the Uncommon Wisdom Awards represent the best of what ATG offers to its users and their customers," said Cliff Conneighton, ATG's senior vice president of marketing.
Rich Internet Applications: ATG partner and sponsor Allurent, along with ATG customer Intuit will discuss deploying rich Internet applications on the ATG Commerce platform.
By expanding its use of ATG Wisdom-enabled products, Neiman Marcus is making a commitment to its customer base that it will offer the same personal service and customer knowledge in its online e-commerce that it offers in its stores.
As previously announced, ATG will continue to develop and support its ATG Dynamo Application Server for customers who want to use the full ATG Dynamo suite to run their Websites.
In making its operations truly multi-channel, the retailer has turned to ATG to better its ecommerce site and increase the number of touch points consumers have with the company.
ATG Self-Service, ATG's natural language processing search engine, enables customers to find and act on the exact information they need, regardless of format, location or language.
More Sites in the Top 300 Named by Internet Retailer Run on ATG Than Any Other Vendor; Two ATG Customers Hold Top Spots in Both Benchmark Study and RIS Fusion Awards for Customer Experience
International Aeronautical Services Provider Selects ATG Commerce to Drive Personalized Shopping Experiences
ATG acquired eStara for consideration consisting of approximately 15.