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Photometry
GPx / GSHPX can only be determined in unclotted EDTA or heparin whole blood samples, because the value is linked to haemoglobin.
- GPx is an antioxidant.
- As a selenium-containing enzyme, the GPx level indicates the supply of selenium to the animal within the last 2 – 3 weeks. Thus, GPx cannot indiate an acute undersupply of selenium. An oversupply cannot be diagnosed by determining the GPx level.
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