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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 ...
The human version is human serum albumin. Bovine serum albumin, or BSA, is commonly used in immunodiagnostic procedures, clinical chemistry reagents, cell culture media, protein chemistry research (including venom toxicity), and molecular biology laboratories (usually to leverage its non-specific protein binding properties).
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]
In summary, in order to find a standard curve, one must use varying concentrations of BSA (Bovine Serum Albumin) [2] in order to create a standard curve with concentration plotted on the x-axis and absorbance plotted on the y-axis. Only a narrow concentration of BSA is used (2-10 ug/mL) in order to create an accurate standard curve. [23]
Dr. White used to collect old medical instruments on eBay, and she was shocked by how little gynecological tools have changed since their inception. Take the tenaculum, the surgical tool ...
The major protein in whey is β-lactoglobulin, followed by α-lactalbumin (β-lactoglobulin ≈ 65%, α-lactalbumin ≈ 25%, serum albumin ≈ 8%, other ≈ 2%). β-lactoglobulin is a lipocalin protein, and can bind many hydrophobic molecules, suggesting a role in their transport. β-lactoglobulin has also been shown to be able to bind iron via siderophores [7 ...
For cutting those extra large sandwiches, Cahn uses “lots and lots of toothpicks,” to hold the sandwich together, and a serrated knife to slice as close to the bottom as possible.
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