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External water molecules positioned close to the iron-sulfur active site reduces covalency; this can be shown by lyophilization experiments where water is removed from the protein. This reduction is because external water hydrogen bonds with cysteine S, decreasing the latter's lone pair electron donation to the Fe 3+/2+ by pulling away S ...
The potential role of succinylation is under investigation, but as addition of succinyl group changes lysine's charge from +1 to −1 (at physiological pH) and introduces a relatively large structural moiety (100 Da), bigger than acetylation (42 Da) or methylation (14 Da), it is expected to lead to more significant changes in protein structure ...
The GSRS uses molecular structure, protein and nucleic sequences and descriptive information to generate the UNII. The preferred means for defining a chemical substance is by its two-dimensional molecular structure since it is pertinent to a substance's identity and information regarding a substance's stereochemistry is readily available. [ 5 ]
Iron–sulfur clusters are molecular ensembles of iron and sulfide. They are most often discussed in the context of the biological role for iron–sulfur proteins , which are pervasive. [ 2 ] Many Fe–S clusters are known in the area of organometallic chemistry and as precursors to synthetic analogues of the biological clusters.
Water retention can be a symptom of an imbalance of electrolytes, says Schnoll-Sussman. Electrolytes are essential minerals including sodium, potassium, magnesium and calcium, per the Cleveland ...
Iron is also stored as a pigment called hemosiderin, which is an ill-defined deposit of protein and iron, created by macrophages where excess iron is present, either locally or systemically, e.g., among people with iron overload due to frequent blood cell destruction and the necessary transfusions their condition calls for. If systemic iron ...
Iron supplements, also known as iron salts and iron pills, are a number of iron formulations used to treat and prevent iron deficiency including iron deficiency anemia. [ 11 ] [ 12 ] For prevention they are only recommended in those with poor absorption , heavy menstrual periods , pregnancy , hemodialysis , or a diet low in iron.
It is the primary intracellular iron-storage protein in both prokaryotes and eukaryotes, keeping iron in a soluble and non-toxic form. In humans, it acts as a buffer against iron deficiency and iron overload. [3] Ferritin is found in most tissues as a cytosolic protein, but small amounts are secreted into the serum where it functions as an iron ...