Supplier: Thermo Fisher Scientific

Thermo Scientific Pierce Urea is ≥99% pure, crystalline urea, a protein denaturant with low UV absorptivity. In addition to increasing solubility of hydrophobic molecules, urea is a general protein denaturant, unfolding proteins and altering their three-dimensional structures.

Supplier: Thermo Fisher Scientific

Urea 99%, Ultrapure

Supplier: Merck Millipore (Calbiochem‎)

Urea, Calbiochem®

Supplier: Thermo Fisher Scientific

Urea ≥99.5%, Ultrapure for molecular biology

Supplier: Honeywell Chemicals

Urea 99.0-100.5%, meets analytical specification of BP, Ph. Eur., USP, Fluka™

Supplier: Honeywell Chemicals

Urea ≥99.5%, Puriss. p.a. ACS, Reag. Ph. Eur., Fluka™

Supplier: Cytiva

Urea

Supplier: Thermo Fisher Scientific

Urea 99+% for biochemistry

Supplier: MP Biomedicals

Urea is a mild agent usually used in the solubilization and denaturation of proteins.

Supplier: MP Biomedicals

Urea is the principal end product of nitrogen metabolism in most mammals, formed by the enzymatic reactions of the Kreb's cycle.

Supplier: Spectrum Chemical

Urea, USP, JP is used in topical dermatological products to promote rehydration of the skin. Urea preparations are also used for non-surgical removal of damaged or dead nails. All Spectrum Chemical USP, JP products are manufactured, packaged and stored under current Good Manufacturing Practices (cGMP) per 21CFR part 211 in FDA registered and inspected facilities.

Supplier: MERCK PRODUCTION CHEMICALS

Urea 98.0-102.0% (by HPLC), crystalline, EMPROVE® ESSENTIAL Ph. Eur., BP, USP, JP, SAFC®

Supplier: MP Biomedicals

Urea is a prinicipal protein metabolite end product of nitrogen metabolism in most mammals, formed by the enzymatic reactions of the Kreb's cycle and the major product for the removal of free ammonia (NH4+) in vivo.

Supplier: MERCK PRODUCTION CHEMICALS

Urea, EMPROVE® EXPERT BP, Ph. Eur., ACS, JP, USP for biopharmaceutical production, SAFC®

Supplier: MP Biomedicals

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: MP Biomedicals

Urea is a mild agent usually used in the solubilization and denaturation of proteins. It is also useful for renaturing proteins from samples already denatured with 6 M guanidine hydrochloride such as inclusion bodies; and in the extraction of the mitochondrial complex.

Supplier: Spectrum Chemical

Urea, FCC is a component of animal feed, providing a relatively cheap source of nitrogen to promote growth. The FCC grade meets the requirements of the Food Chemical Codex indicates and is suitable for all food, beverage, nutritional supplements and personal care applications. Spectrum Chemical offers over 300 Food grade chemical ingredients packaged in laboratory size bottles to production drum quantities and are manufactured, packaged and stored under current Good Manufacturing Practices (cGMP) per 21CFR part 211 in FDA registered and inspected facilities.

Supplier: MERCK PRODUCTION CHEMICALS

Urea, EMPROVE® api BP, Ph. Eur., USP suitable for use as an active pharmaceutical ingredient, SAFC®

Supplier: LGC Standards PROMOCHEM

Urea

Supplier: LGC Standards PROMOCHEM

Urea

Supplier: Serva

Urea

Supplier: Molekula

Urea

Supplier: Roth Carl

Urea

Supplier: Serva

Urea

Supplier: Molekula

Urea

Supplier: Ambion

Urea

Supplier: Roth Carl

Urea

Supplier: Roth Carl

Urea

Supplier: Roth Carl

Urea

Supplier: Roth Carl

Urea