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Noxzema (/ n ɒ k ˈ s iː m ə / nok-SEE-mə) [1] is an American brand of skin cleanser marketed by Elida Beauty. Since 1914, [2] it was sold in a small cobalt blue jar; but is now sold in a blue plastic jar.
Biotin deficiency is a nutritional disorder which can become serious, even fatal, if allowed to progress untreated. It can occur in people of any age, ancestry, or of ...
Low serum and urine biotin are not sensitive indicators of inadequate biotin intake. [4] However, serum testing can be useful for confirmation of consumption of biotin-containing dietary supplements, and whether a period of refraining from supplement use is long enough to eliminate the potential for interfering with drug tests.
Biocytin is a chemical compound that is an amide formed from the vitamin biotin and the amino acid L-lysine. As an intermediate in the metabolism of biotin, biocytin occurs naturally in blood serum and urine. The enzyme biotinidase cleaves biocytin and makes biotin available to be reused
Fetal bovine serum (FBS) is the most widely used serum-supplement for the in vitro cell culture of eukaryotic cells. This is due to it having a very low level of antibodies and containing more growth factors , allowing for versatility in many cell culture applications.
The biotin tag can be used in affinity chromatography together with a column that has avidin (or streptavidin or neutravidin) bound to it, which is the natural ligand for biotin. However, harsh conditions (e.g., 6M GuHCl at pH 1.5) are needed to break the avidin/streptavidin - biotin interaction, which will most likely denature the protein ...