Sulfur is an essential element for all life, but almost always in the form of organosulfur compounds or metal sulfides. Three amino acids (cysteine, cystine, and methionine) and two vitamins (biotin and thiamine) are organosulfur compounds.
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BrdU is a synthetic analogue of Thymidine that is also incorportated into cells during DNA replication, which allows us to successfully identify dividing cells. Essentially, BrdU provides scientists with a way of staining cells that are proliferating in the human brain.rdU is a synthetic analogue of Thymidine that is also incorportated into cells during DNA replication, which allows us to successfully identify dividing cells. Essentially, BrdU provides scientists with a way of staining cells that are proliferating in the human brain.