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Supplier: Thermo Fisher Scientific
Description: Octyl butyrate ≥97%
Supplier: Thermo Fisher Scientific
Description: Butyl butyrate 98%
Supplier: Thermo Fisher Scientific
Description: Butyl butyrate ≥99%
Supplier: Thermo Fisher Scientific
Description: Ethyl butyrate 99%
Supplier: Thermo Fisher Scientific
Description: Butyric anhydride 98%
Supplier: Apollo Scientific
Description: N-Boc-(R)-2-(methylamino)butyric acid 97%

Supplier: Thermo Fisher Scientific
Description: Methyl butyrate 99%
Supplier: Apollo Scientific
Description: 4-(2-Thienyl)butyric acid 97%

Supplier: Apollo Scientific
Description: 4-(3-Trifluoromethylphenoxy)butyric acid

Supplier: Apollo Scientific
Description: 2,2,3,3,3-Pentafluoropropyl butyrate

Catalog Number: (APOSOR471424-1G)
Supplier: Apollo Scientific
Description: (R)-2-(1-Pyrrolidinyl)butyric acid
UOM: 1 * 1 g


Catalog Number: (APOSOR6005-100G)
Supplier: Apollo Scientific
Description: Butyric acid 95%
UOM: 1 * 100 g


Supplier: MP Biomedicals
Description: Applications:
Urea is used for the denaturation of proteins and as a mild solubilization agent for insoluble or denatured proteins. Useful for renaturing proteins from samples already denatured with 6 M guanidine chloride such as inclusion bodies and in the extraction of the mitochondrial complex. It is commonly used to solubilize and denature proteins for denaturing isoelectric focusing and two-dimensional electrophoresis and in acetic acid-urea PAGE gels. May be used with guanidine hydrochloride and dithiothreitrol (DTT) in the refolding of denatured proteins into their native or active form. Urea is used in cell or tissue culture media to increase the osmolality. Urea has also been used as fertilizer because of the easy availability of nitrogen; in animal feeds; it is reacted with aldehydes to make resins and plastics; condensed with malonic ester to form barbituric acid; used in the paper industry to soften cellulose.
Biochem/physiol Actions:
Urea has been shown to act as an aldosterone antagonist in the development of peanut agglutinin binding in cultured embryonic renal collecting duct epithelial cells. Urea is the principal end product of nitrogen metabolism in most mammals, formed by the enzymatic reactions of the Kreb's cycle.
Typical Working Concentration:
The use of 2 g/L urea in the culture of Kluyveromyces marxianus to produce a thermostable extracellular lipase has been described. Urea is typically used at a concentration of 8 M for protein denaturation or solubilization. A final concentration of 5 M urea is commonly used in molecular biology for sequencing gels. To prevent carbamylation, do not heat urea containing buffers above 37 °C

Supplier: Thermo Fisher Scientific
Description: 3-Hydroxy-3-methyl butyric acid ≥96%
Catalog Number: (L11000.06)
Supplier: Thermo Fisher Scientific
Description: Methyl-4-(methylthio)butyrate 96%
UOM: 1 * 5 g

Supplier: Apollo Scientific
Description: N-Boc-(S)-2-(methylamino)butyric acid 97%

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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us on +353 1 88 22222.
Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us on +353 1 88 22222.
This product is marked as restricted and can only be purchased by approved Shipping Accounts. If you need further assistance, email VWR Regulatory Department at eurega_services@eu.vwr.com
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This product has been blocked by your organisation. Please contact your purchasing department for more information.
The original product is no longer available. The replacement shown is available.
Product(s) marked with this symbol are discontinued - sold till end of stock. Alternatives may be available by searching with the VWR Catalog Number listed above. If you need further assistance, please call VWR Customer Service on +353 1 8822222.
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