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Nature is abound with organosulfur compounds—sulfur is vital for life. Of the 20 common amino acids, two (cysteine and methionine) are organosulfur compounds, and the antibiotics penicillin and sulfa drugs both contain sulfur. While sulfur-containing antibiotics save many lives, sulfur mustard is a deadly chemical warfare agent.
From the sulfide they form the amino acids cysteine and methionine, sulfolipids, and other sulfur compounds. Animals obtain sulfur from cysteine and methionine in the protein that they consume. Sulfur is the third most abundant mineral element in the body. [21] The amino acids cysteine and methionine are used by the body to make glutathione.
In animals, sulfur assimilation occurs primarily through the diet, as animals cannot produce sulfur-containing compounds directly. Sulfur is incorporated into amino acids such as cysteine and methionine, which are used to build proteins and other important molecules. [2]
Because sulfur-containing amino acids play a role in multiple biological processes, the regulation of these amino acids is essential. Additionally, it is crucial to maintain low homocysteine levels for the proper functioning of various pathways and for preventing the toxic effects of the cysteine homologue. [ 1 ]
This is an accepted version of this page This is the latest accepted revision, reviewed on 21 February 2025. This article is about the chemical element. For other uses, see Sulfur (disambiguation). Chemical element with atomic number 16 (S) Sulfur, 16 S Sulfur Alternative name Sulphur (pre-1992 British spelling) Allotropes see Allotropes of sulfur Appearance Lemon yellow sintered microcrystals ...
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Sulfur is contained in the amino acids cysteine and methionine. [3] Phosphorus is contained in phospholipids , a class of lipids that are a major component of all cell membranes , as they can form lipid bilayers , which keep CO2 , proteins , and other molecules where they are needed for cell function, and prevent them from diffusing into areas ...
The need for nitrogen is addressed by requirements set for protein, which is composed of nitrogen-containing amino acids. Sulfur is essential, but again does not have a recommended intake. Instead, recommended intakes are identified for the sulfur-containing amino acids methionine and cysteine.