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Revision as of 16:26, 14 February 2011 editBeetstra (talk | contribs)Edit filter managers, Administrators172,031 edits Script assisted update of identifiers from ChemSpider, CommonChemistry and FDA for the Chem/Drugbox validation project - Updated: ChEMBL.← Previous edit Latest revision as of 10:10, 12 August 2024 edit undoKormiSK (talk | contribs)Extended confirmed users919 editsNo edit summaryTag: Visual edit 
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{{chembox {{chembox
| Watchedfields = changed
| verifiedrevid = 399692069 | verifiedrevid = 413897454
| Name = Bicinchoninic acid
| ImageFile = Bicinchoninic acid.svg | Name = Bicinchoninic acid
| ImageFile = Structure of bicinchoninic acid.png
<!-- | ImageSize = 200px -->
| ImageName = | ImageName =
| PIN = -4,4′-dicarboxylic acid
| IUPACName = 2-(4-carboxyquinolin-2-yl)quinoline-4-carboxylic acid
| OtherNames = Bicinchoninic acid</br>4,4'-Dicarboxy-2,2'-Biquinoline | OtherNames = Bicinchoninic acid<br>4,4′-Dicarboxy-2,2′-biquinoline<br>2,2'-Biquinoline-4,4'-dicarboxylic acid
| Section1 = {{Chembox Identifiers |Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 64223 | ChemSpiderID = 64223
| InChI = 1/C20H12N2O4/c23-19(24)13-9-17(21-15-7-3-1-5-11(13)15)18-10-14(20(25)26)12-6-2-4-8-16(12)22-18/h1-10H,(H,23,24)(H,25,26)
| SMILES = O=C(O)c1cc(nc2c1cccc2)c3nc4ccccc4c(c3)C(=O)O | SMILES = O=C(O)c1cc(nc2c1cccc2)c3nc4ccccc4c(c3)C(=O)O
| InChIKey = AFYNADDZULBEJA-UHFFFAOYAF
| PubChem = 71068 | PubChem = 71068
| ChEMBL_Ref = {{ebicite|correct|EBI}}
| ChEMBL = 431482 | ChEMBL = 431482
| StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI_Ref = {{stdinchicite|correct|chemspider}}
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = AFYNADDZULBEJA-UHFFFAOYSA-N | StdInChIKey = AFYNADDZULBEJA-UHFFFAOYSA-N
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 1245-13-2 | CASNo = 1245-13-2
| CASNo_Comment = (free acid)
| RTECS =
| CASNo2_Ref = {{cascite|unknown|CAS}}
| CASNo2 = 979-88-4
| CASNo2_Comment = (disodium salt)
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = CX56TX9Y1I
| RTECS =
}} }}
| Section2 = {{Chembox Properties |Section2={{Chembox Properties
| C=20|H=12|N=2|O=4
| Formula = (HO<sub>2</sub>CC<sub>9</sub>H<sub>5</sub>N)<sub>2</sub>
| Appearance = Cream colored powder
| MolarMass = 344.33 g/mol
| Appearance = Cream powder. Characteristic odor. | Odor = Characteristic odor{{vague|date=October 2013}}
| Density =
| Density = Solid in pure form.</br>Density not available.
| Solubility = Partially soluble in cold water, hot water. | Solubility = Partially soluble in cold water, hot water{{vague|date=October 2013}}
| MeltingPtC = 352
| MeltingPt = 365 to 367 °C
| MeltingPt_notes = decomposes
| BoilingPt = Not available.
| pKa = | BoilingPt =
| pKa =
}} }}
| Section3 = {{Chembox Structure |Section3={{Chembox Structure
| CrystalStruct = | CrystalStruct =
| Dipole = | Dipole =
}} }}
| Section7 = {{Chembox Hazards |Section7={{Chembox Hazards
| ExternalMSDS = | ExternalSDS =
| MainHazards = Will irritate eyes and mucous membranes.
| MainHazards = Will irritate eyes and mucous membranes.<br />The chemical, physical and toxicological<br />properties have not been fully investigated.<br />Presume moderate toxicity internally. LD/TD<br />no data. OSHA PEL/ACGIH TLV not established.<br />No evidence of carcinogenicity.
| NFPA-H = 1 | NFPA-H = 1
| NFPA-R = | NFPA-R =
| NFPA-F = | NFPA-F =
| FlashPt = N/A | FlashPt =
}} }}
}} }}


'''Bicinchoninic acid''' ({{IPAc-en|b|aɪ|s|ɪ|n|k|ɔː|n|ɪ|n|ɪ|k}}) or '''BCA''' is a ] composed of two ]ated ] rings. It is an organic compound with the formula (C<sub>9</sub>H<sub>5</sub>NCO<sub>2</sub>H)<sub>2</sub>. The molecule consists of a pair of ] rings, each bearing a ] group. Its ] forms a purple complex with ] ions.<ref>{{Cite journal|year=1985|title=Measurement of Protein Using Bicinchoninic Acid|journal=Analytical Biochemistry|volume=150|issue=1|pages=76–85|doi=10.1016/0003-2697(85)90442-7|last1=Smith |first1=P.K. |last2=Krohn |first2=R.I. |last3=Hermanson |first3=G.T. |last4=Mallia |first4=A.K. |last5=Gartner |first5=F.H. |last6=Provenzano |first6=M.D. |last7=Fujimoto |first7=E.K. |last8=Goeke |first8=N.M. |last9=Olson |first9=B.J. |last10=Klenk |first10=D.C. |pmid=3843705 }}</ref><ref>{{cite journal |doi=10.1016/0003-2697(89)90101-2|title=Protein measurement using bicinchoninic acid: Elimination of interfering substances |year=1989 |last1=Brown |first1=Rhoderick E. |last2=Jarvis |first2=Kari L. |last3=Hyland |first3=Kristi J. |journal=Analytical Biochemistry |volume=180 |issue=1 |pages=136–139 |pmid=2817336 }}</ref><ref>{{cite book |doi=10.1016/S0076-6879(09)63008-1|chapter=Chapter 8 Quantitation of Protein |title=Guide to Protein Purification, 2nd Edition |series=Methods in Enzymology |year=2009 |last1=Noble |first1=James E. |last2=Bailey |first2=Marc J.A. |volume=463 |pages=73–95 |pmid=19892168 |isbn=9780123745361 }}</ref>
'''Bicinchoninic acid''' is a weak acid composed of two ]ated ] rings.


Bicinchoninic acid is most commonly employed by biochemists in the ], which is used to determine the total level of protein in a solution. In this assay, two molecules of bicinchoninic acid ] a single ]<sup>1+</sup> ion, forming a purple water-soluble complex that strongly absorbs light at 562 ].<ref></ref> Bicinchoninic acid is most commonly employed in the ], which is used to determine the total concentration of ] in a solution. Bicinchoninic acid is used to detect the presence of cuprous ions, due to its purple coloration via a ]. In this assay, two molecules of bicinchoninic acid ] a single ]<sup>+</sup> ion, forming a purple water-soluble complex that strongly absorbs light at 562 ].<ref></ref>


==References== ==References==
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