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Transferrin glycoproteins bind iron tightly, but reversibly. Although iron bound to transferrin is less than 0.1% (4 mg) of total body iron, it forms the most vital iron pool with the highest rate of turnover (25 mg/24 h). Transferrin has a molecular weight of around 80 kDa and contains two specific high-affinity Fe(III) binding sites.
[17] [18] The higher order multifunctional glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) also acts as a transferrin receptor. [19] [20] Transferrin-bound ferric iron is recognized by these transferrin receptors, triggering a conformational change that causes endocytosis. Iron then enters the cytoplasm from the endosome via ...
Biologically, conalbumin isolates and sequesters metallic contaminants in the egg white. [3] Ovotransferrin is functionally and structurally analogous to mammalian lactoferrin [4] A recent study has shown superior performance of ovotransferrin when compared to lactoferrin in its capability to deliver iron without accumulation or inducing gastric irritability, rendering ovotransferrin as an ...
Total iron-binding capacity (TIBC) or sometimes transferrin iron-binding capacity is a medical laboratory test that measures the blood's capacity to bind iron with transferrin. [1] Transferrin can bind two atoms of ferric iron (Fe 3+ ) with high affinity.
A glycoprotein is a compound containing carbohydrate (or glycan) covalently linked to protein. The carbohydrate may be in the form of a monosaccharide, disaccharide(s), oligosaccharide(s), polysaccharide(s), or their derivatives (e.g. sulfo- or phospho-substituted). One, a few, or many carbohydrate units may be present.
Beta-2 transferrin is a carbohydrate-free isoform of transferrin, which is almost exclusively found in the cerebrospinal fluid. It is not found in blood , mucus or tears , thus making it a specific marker of cerebrospinal fluid, applied as an assay in cases where cerebrospinal fluid leakage is suspected.
Transferrin receptor protein 1 (TfR1), also known as Cluster of Differentiation 71 (CD71), is a protein that in humans is encoded by the TFRC gene. [ 5 ] [ 6 ] TfR1 is required for iron import from transferrin into cells by endocytosis .
The 3 substrates of this enzyme are [[transferrin[Fe(II)]2]], NAD +, and H +, whereas its two products are [[transferrin[Fe(III)]2]] and NADH. This enzyme belongs to the family of oxidoreductases, specifically those oxidizing metal ion with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is transferrin[Fe(II)]2:NAD+ ...
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