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Bovine serum albumin (BSA or "Fraction V") is a serum albumin protein derived from cows. It is often used as a protein concentration standard in lab experiments. The nickname "Fraction V" refers to albumin being the fifth fraction of the original Edwin Cohn purification methodology that made use of differential solubility characteristics of plasma proteins.
Fetal bovine serum is derived from the blood drawn from a bovine fetus via a closed system of collection at the slaughterhouse. The globular protein bovine serum albumin (BSA) is a major component of fetal bovine serum. Besides BSA, fetal bovine serum is a rich source of growth and attachment factors, lipids, hormones, nutrients and ...
Serum albumin, often referred to simply as blood albumin, is an albumin (a type of globular protein) found in vertebrate blood. Human serum albumin is encoded by the ALB gene . [ 2 ] [ 3 ] [ 4 ] Other mammalian forms, such as bovine serum albumin , are chemically similar.
Media formulations containing the media supplement B27 (supplied by Invitrogen) are often erroneously referred to as chemically defined media (e.g. Yao et al., 2006) despite this product containing bovine serum albumin (Chen et al., 2008) using the above definitions this type of media is referred to as serum-free media.
The best known representative of carrier proteins is serum albumin, [citation needed] the most abundant protein in the blood plasma of adult animals. Fetuin is more abundant in fetal blood, hence the name "fetuin" (from Latin, fetus). Fetal bovine serum contains more fetuin than albumin, while adult serum contains more albumin than fetuin.
This protein is typically a mixture of beta-lactoglobulin (~65%), alpha-lactalbumin (~25%), bovine serum albumin (~8%) (see also serum albumin), and immunoglobulins. [12] The third largest fragment of whey protein isolate derived from sweet whey is glycomacropeptide or GMP.
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The 3D structure of human serum albumin has been determined by X-ray crystallography to a resolution of 2.5 ångströms (250 pm). [1] Albumin is a 65–70 kDa protein. Albumin comprises three homologous domains that assemble to form a heart-shaped protein. [2] Each domain is a product of two subdomains that possess common structural motifs. [2]
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