Proteins

 
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Proteins account for a large amount of the dissolved substances in plasma/serum. These proteins are a very heterogenous group of over a thousand individual proteins, with a variety of functions including maintenance of oncotic pressure, transportation of substances, coagulation, etc. In this section, we will cover the following:

The test results on a chemistry panel provide quantitative values for the major proteins. However, there are many proteins found within the globulin fraction and the total globulin result does not provide information on these fractions. Electrophoresis, in contrast, provides both quantitative and qualitative data for the different fractions that comprise total protein and can be used on serum, urine or body cavity fluid samples (e.g. cerebrospinal fluid). Ammonia and uric acid are by-products of protein metabolism. More information on ammonia is found under liver tests.
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