D-Biotin, Fisher BioReagents

Thermo Scientific Chemicals (+)-Biotin N-hydroxysuccinimide ester, 98%

CAS: 35013-72-0 Molecular Formula: C₁₄H₁₉N₃O₅S Molecular Weight (g/mol): 341.39 InChI Key: YMXHPSHLTSZXKH-RVBZMBCESA-N Synonym: +-biotin n-hydroxysuccinimide ester,biotin-nhs,biotin nhs,2,5-dioxopyrrolidin-1-yl 5-3as,4s,6ar-2-oxohexahydro-1h-thieno 3,4-d imidazol-4-yl pentanoate,n-hydroxysuccinimidobiotin,d-biotinyl-osu,biotin-osu,n-succinimidyl d-biotinate,bhse,biotin n-hydroxysuccinimide ester PubChem CID: 6710714 IUPAC Name: (2,5-dioxopyrrolidin-1-yl) 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoate SMILES: C1CC(=O)N(C1=O)OC(=O)CCCCC2C3C(CS2)NC(=O)N3

Biotin-PEG11-Amine 93.0+%, TCI America™

CAS: 1418022-42-0 Molecular Formula: C34H66N4O13S Molecular Weight (g/mol): 770.977 InChI Key: SHPHAOSBFNWGAC-PHDGFQFKSA-N Synonym: N-Biotinyl-3,6,9,12,15,18,21,24,27,30,33-undecaoxapentatriacontane-1,35-diamine, N-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-Aminoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl]biotinamide PubChem CID: 77078444 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl]pentanamide SMILES: C1C2C(C(S1)CCCCC(=O)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCN)NC(=O)N2

Biotin, Powder, FCC, 97.5-100.5%, Spectrum™ Chemical

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CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N IUPAC Name: 5-{2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl}pentanoic acid SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

N′′-Biotinyl-6-aminohexanoylhydrazide 97.0+%, TCI America™

CAS: 109276-34-8 Molecular Formula: C16H29N5O3S Molecular Weight (g/mol): 371.5 MDL Number: MFCD00077659 InChI Key: IJJWOSAXNHWBPR-HUBLWGQQSA-N Synonym: Biotin-LC-Hydrazide, N-(6-Hydrazinyl-6-oxohexyl)biotinamide PubChem CID: 83900 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-(6-hydrazinyl-6-oxohexyl)pentanamide SMILES: C1C2C(C(S1)CCCCC(=O)NCCCCCC(=O)NN)NC(=O)N2

(+)-Biotin 4-Nitrophenyl Ester 98.0+%, TCI America™

CAS: 33755-53-2 Molecular Formula: C16H19N3O5S Molecular Weight (g/mol): 365.40 MDL Number: MFCD15141972 InChI Key: YUDNXDTXQPYKCA-YDHLFZDLSA-N Synonym: +-biotin 4-nitrophenyl ester,d-biotin p-nitrophenyl ester,biotinyl-4-nitrophenyl ester,bnp, d-biotin 4-nitrophenyl ester,biotin-p-nitrophenyl ester,4-nitrophenyl 5-3as,4s,6ar-2-oxo-hexahydrothieno 3,4-d imidazol-4-yl pentanoate,biotin p-nitrophenyl ester,4-nitrophenyl +-biotinate,+-biotin p-nitrophenyl ester,4-nitrophenyl 5-3as,4s,6ar-2-oxohexahydro-1h-thieno 3,4-d imidazol-4-yl pentanoate PubChem CID: 83848 IUPAC Name: 4-nitrophenyl 5-[(3aS,4S,6aR)-2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoate SMILES: [O-][N+](=O)C1=CC=C(OC(=O)CCCC[C@@H]2SC[C@@H]3NC(=O)N[C@H]23)C=C1

(+)-Biotin N-succinimidyl ester, 98%, Thermo Scientific Chemicals

CAS: 35013-72-0 Molecular Formula: C14H19N3O5S Molecular Weight (g/mol): 341.382 MDL Number: MFCD00078531 InChI Key: YMXHPSHLTSZXKH-RVBZMBCESA-N Synonym: +-biotin n-hydroxysuccinimide ester,biotin-nhs,biotin nhs,2,5-dioxopyrrolidin-1-yl 5-3as,4s,6ar-2-oxohexahydro-1h-thieno 3,4-d imidazol-4-yl pentanoate,n-hydroxysuccinimidobiotin,d-biotinyl-osu,biotin-osu,n-succinimidyl d-biotinate,bhse,biotin n-hydroxysuccinimide ester PubChem CID: 6710714 IUPAC Name: (2,5-dioxopyrrolidin-1-yl) 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoate SMILES: C1CC(=O)N(C1=O)OC(=O)CCCCC2C3C(CS2)NC(=O)N3

N-Biotinyl-N′-(3-maleimidopropionyl)-3,6-dioxaoctane-1,8-diamine 90.0+%, TCI America™

CAS: 305372-39-8 Molecular Formula: C23H35N5O7S Molecular Weight (g/mol): 525.621 InChI Key: UDPCXVIKHFVPSZ-HOIFWPIMSA-N Synonym: N-[2-[2-[2-[(3-Maleimidopropionyl)amino]ethoxy]ethoxy]ethyl]biotinamide, Maleimide-PEG2-Biotin PubChem CID: 11168457 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethyl]pentanamide SMILES: C1C2C(C(S1)CCCCC(=O)NCCOCCOCCNC(=O)CCN3C(=O)C=CC3=O)NC(=O)N2

Biotin-PEG3-Amine 95.0+%, TCI America™

CAS: 359860-27-8 Molecular Formula: C18H34N4O5S Molecular Weight (g/mol): 418.553 MDL Number: MFCD09952640 InChI Key: KIJSBKNJFAUJFV-ZOBUZTSGSA-N Synonym: N-Biotinyl-3,6,9-trioxaundecane-1,11-diamine, N-[2-[2-[2-(2-Aminoethoxy)ethoxy]ethoxy]ethyl]biotinamide PubChem CID: 50896259 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethyl]pentanamide SMILES: C1C2C(C(S1)CCCCC(=O)NCCOCCOCCOCCN)NC(=O)N2

Biotin-PEG2-Amine 98.0+%, TCI America™

CAS: 138529-46-1 Molecular Formula: C16H30N4O4S Molecular Weight (g/mol): 374.50 MDL Number: MFCD09264745 InChI Key: LWISPDYGRSGXME-UHFFFAOYNA-N Synonym: N-Biotinyl-3,6-dioxaoctane-1,8-diamine, N-[2-[2-(2-Aminoethoxy)ethoxy]ethyl]biotinamide PubChem CID: 11199678 IUPAC Name: N-{2-[2-(2-aminoethoxy)ethoxy]ethyl}-5-{2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl}pentanamide SMILES: NCCOCCOCCNC(=O)CCCCC1SCC2NC(=O)NC12

N-Succinimidyl 9-(Biotinamido)-4,7-dioxanonanoate, TCI America™

CAS: 596820-83-6 Molecular Formula: C21H32N4O8S Molecular Weight (g/mol): 500.567 InChI Key: UCJSJBIJPAZUGU-AVYPCKFXSA-N Synonym: 9-(Biotinamido)-4,7-dioxanonanoic Acid N-Succinimidyl Ester, Biotin-PEG2-NHS PubChem CID: 91757819 IUPAC Name: (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]ethoxy]ethoxy]propanoate SMILES: C1CC(=O)N(C1=O)OC(=O)CCOCCOCCNC(=O)CCCCC2C3C(CS2)NC(=O)N3

N-Succinimidyl 6-Biotinamidohexanoate 97.0+%, TCI America™

CAS: 72040-63-2 Molecular Formula: C20H30N4O6S Molecular Weight (g/mol): 454.542 MDL Number: MFCD00065502 InChI Key: UVGHPGOONBRLCX-NJSLBKSFSA-N Synonym: 6-Biotinamidohexanoic Acid N-Succinimidyl Ester, N-[5-(N-Succinimidyloxycarbonyl)pentyl]biotinamide, N-Biotinyl-6-aminohexanoic Acid Succinimidyl Ester PubChem CID: 83874 IUPAC Name: (2,5-dioxopyrrolidin-1-yl) 6-[5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]hexanoate SMILES: C1CC(=O)N(C1=O)OC(=O)CCCCCNC(=O)CCCCC2C3C(CS2)NC(=O)N3

N-Succinimidyl D-Biotinate 97.0+%, TCI America™

CAS: 35013-72-0 Molecular Formula: C14H19N3O5S Molecular Weight (g/mol): 341.382 MDL Number: MFCD00078531 InChI Key: YMXHPSHLTSZXKH-RVBZMBCESA-N Synonym: +-biotin n-hydroxysuccinimide ester,biotin-nhs,biotin nhs,2,5-dioxopyrrolidin-1-yl 5-3as,4s,6ar-2-oxohexahydro-1h-thieno 3,4-d imidazol-4-yl pentanoate,n-hydroxysuccinimidobiotin,d-biotinyl-osu,biotin-osu,n-succinimidyl d-biotinate,bhse,biotin n-hydroxysuccinimide ester PubChem CID: 6710714 IUPAC Name: (2,5-dioxopyrrolidin-1-yl) 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoate SMILES: C1CC(=O)N(C1=O)OC(=O)CCCCC2C3C(CS2)NC(=O)N3

D-(+)-Biotin, 98+%, Thermo Scientific Chemicals

CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N Synonym: biotin,d-biotin,vitamin h,coenzyme r,vitamin b7,bios ii,factor s,bioepiderm,d +-biotin,biodermatin PubChem CID: 171548 ChEBI: CHEBI:15956 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoic acid SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

N-(3-Azidopropyl)biotinamide 95.0+%, TCI America™

CAS: 908007-17-0 Molecular Formula: C13H22N6O2S Molecular Weight (g/mol): 326.419 MDL Number: MFCD20134144 InChI Key: SWODDJWJUGOAQB-NHCYSSNCSA-N PubChem CID: 59828156 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-(3-azidopropyl)pentanamide SMILES: C1C2C(C(S1)CCCCC(=O)NCCCN=[N+]=[N-])NC(=O)N2

(+)-Biotin 4-nitrophenyl ester, 98%, Thermo Scientific™

CAS: 33755-53-2 Molecular Formula: C16H19N3O5S Molecular Weight (g/mol): 365.40 MDL Number: MFCD15141972 InChI Key: YUDNXDTXQPYKCA-YDHLFZDLSA-N Synonym: +-biotin 4-nitrophenyl ester,d-biotin p-nitrophenyl ester,biotinyl-4-nitrophenyl ester,bnp, d-biotin 4-nitrophenyl ester,biotin-p-nitrophenyl ester,4-nitrophenyl 5-3as,4s,6ar-2-oxo-hexahydrothieno 3,4-d imidazol-4-yl pentanoate,biotin p-nitrophenyl ester,4-nitrophenyl +-biotinate,+-biotin p-nitrophenyl ester,4-nitrophenyl 5-3as,4s,6ar-2-oxohexahydro-1h-thieno 3,4-d imidazol-4-yl pentanoate PubChem CID: 83848 IUPAC Name: 4-nitrophenyl 5-[(3aS,4S,6aR)-2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoate SMILES: [O-][N+](=O)C1=CC=C(OC(=O)CCCC[C@@H]2SC[C@@H]3NC(=O)N[C@H]23)C=C1

6-Biotinamidohexanoic Acid 97.0+%, TCI America™

CAS: 72040-64-3 Molecular Formula: C16H27N3O4S Molecular Weight (g/mol): 357.469 MDL Number: MFCD00144853 InChI Key: CMUGHZFPFWNUQT-HUBLWGQQSA-N Synonym: N-Biotinyl-6-aminohexanoic Acid, N-(5-Carboxypentyl)biotinamide PubChem CID: 446905 IUPAC Name: 6-[5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]hexanoic acid SMILES: C1C2C(C(S1)CCCCC(=O)NCCCCCC(=O)O)NC(=O)N2

Biotin Hydrazide 98.0+%, TCI America™

CAS: 66640-86-6 Molecular Formula: C10H18N4O2S Molecular Weight (g/mol): 258.34 MDL Number: MFCD00078532 InChI Key: KOZWHQPRAOJMBN-ZKWXMUAHSA-N Synonym: biotin hydrazide,+-biotin hydrazide,5-3as,4s,6ar-2-oxohexahydro-1h-thieno 3,4-d imidazol-4-yl pentanehydrazide,biotin-hydrazide,5-3as,4s,6ar-2-oxohexahydro-1h-thieno 3,4-d imidazol-4-yl pentanehydrazi de,5-3as,4s,6ar-2-oxo-1,3,3a,4,6,6a-hexahydrothieno 3,4-d imidazol-4-yl pentanehydrazide,biotin hydrazone,5-3as,4s,6ar-2-oxo-hexahydrothieno 3,4-d imidazol-4-yl pentanehydrazide,biotin-nhnh2 PubChem CID: 83872 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanehydrazide SMILES: C1C2C(C(S1)CCCCC(=O)NN)NC(=O)N2

Biotin 98.0+%, TCI America™

CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N Synonym: biotin,d-biotin,vitamin h,coenzyme r,vitamin b7,bios ii,factor s,bioepiderm,d +-biotin,biodermatin PubChem CID: 171548 ChEBI: CHEBI:15956 IUPAC Name: 5-{2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl}pentanoic acid SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

Biotin-PEG4-Azide 96.0+%, TCI America™

CAS: 1309649-57-7 Molecular Formula: C20H36N6O6S Molecular Weight (g/mol): 488.604 MDL Number: MFCD29495433 InChI Key: PVEHVEYAPUNCCP-LNLFQRSKSA-N Synonym: N-[2-[2-[2-[2-(2-Azidoethoxy)ethoxy]ethoxy]ethoxy]ethyl]biotinamide PubChem CID: 77078236 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]ethyl]pentanamide SMILES: C1C2C(C(S1)CCCCC(=O)NCCOCCOCCOCCOCCN=[N+]=[N-])NC(=O)N2

Biotin-PEG6-Maleimide 96.0+%, TCI America™

CAS: 1808990-66-0 Molecular Formula: C31H51N5O11S Molecular Weight (g/mol): 701.833 InChI Key: ILVNKONXZBFCPD-QRQMUESOSA-N Synonym: N-Biotinyl-N′-(3-maleimidopropionyl)-3,6,9,12,15,18-hexaoxaicosane-1,20-diamine, N-[2-[2-[2-[2-[2-[2-[2-[(3-Maleimidopropionyl)amino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl]biotinamide PubChem CID: 77078215 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl]pentanamide SMILES: C1C2C(C(S1)CCCCC(=O)NCCOCCOCCOCCOCCOCCOCCNC(=O)CCN3C(=O)C=CC3=O)NC(=O)N2

Biotin, Powder, USP, 97.5-102%, Spectrum™ Chemical

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CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N IUPAC Name: 5-{2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl}pentanoic acid SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

N-GlcNAc-Biotin, TCI America™

CAS: 1272755-69-7 Molecular Formula: C19H31N3O7S Molecular Weight (g/mol): 445.531 InChI Key: FSUXTBPGXKXZDJ-NWGRMCGKSA-N Synonym: 2-Acetamido-N-biotinyl-2-deoxy-beta-D-glucopyranosylamine, 2-Acetamido-2-deoxy-beta-D-glucopyranosylaminobiotin PubChem CID: 44629936 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[(2R,3S,4R,6S)-4,5-dihydroxy-6-(hydroxymethyl)-3-(2-oxopropyl)oxan-2-yl]pentanamide SMILES: CC(=O)CC1C(C(C(OC1NC(=O)CCCCC2C3C(CS2)NC(=O)N3)CO)O)O

N-Succinimidyl N-[6-(Biotinamido)hexanoyl]-6-aminohexanoate 90.0+%, TCI America™

CAS: 89889-52-1 Molecular Formula: C26H41N5O7S Molecular Weight (g/mol): 567.70 MDL Number: MFCD00467154 InChI Key: ATYCFNRXENKXSE-UHFFFAOYNA-N Synonym: N-[6-(Biotinamido)hexanoyl]-6-aminohexanoic Acid N-Succinimidyl Ester, Biotin-LC-LC-NHS PubChem CID: 16219024 IUPAC Name: 2,5-dioxopyrrolidin-1-yl 6-[6-(5-{2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl}pentanamido)hexanamido]hexanoate SMILES: O=C(CCCCCNC(=O)CCCCC1SCC2NC(=O)NC12)NCCCCCC(=O)ON1C(=O)CCC1=O

D-Biotin, ≥97.5%, Cell Culture Reagent Grade, MP Biomedicals™

CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N Synonym: biotin,d-biotin,vitamin h,coenzyme r,vitamin b7,bios ii,factor s,bioepiderm,d +-biotin,biodermatin PubChem CID: 171548 ChEBI: CHEBI:15956 SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

D-Biotin, MP Biomedicals™

CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N Synonym: biotin,d-biotin,vitamin h,coenzyme r,vitamin b7,bios ii,factor s,bioepiderm,d +-biotin,biodermatin PubChem CID: 171548 ChEBI: CHEBI:15956 IUPAC Name: 5-{2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl}pentanoic acid SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

D-Biotin, ≥97.5%, MP Biomedicals™

CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N Synonym: biotin,d-biotin,vitamin h,coenzyme r,vitamin b7,bios ii,factor s,bioepiderm,d +-biotin,biodermatin PubChem CID: 171548 ChEBI: CHEBI:15956 IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoic acid SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

D-Biotin, MP Biomedicals

CAS: 58-85-5 Molecular Formula: C10H16N2O3S Molecular Weight (g/mol): 244.31 MDL Number: MFCD00005541 InChI Key: YBJHBAHKTGYVGT-UHFFFAOYNA-N Synonym: biotin,d-biotin,vitamin h,coenzyme r,vitamin b7,bios ii,factor s,bioepiderm,d +-biotin,biodermatin PubChem CID: 171548 ChEBI: CHEBI:15956 IUPAC Name: 5-{2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl}pentanoic acid SMILES: OC(=O)CCCCC1SCC2NC(=O)NC12

IBA LifeSciences Biotin powder; 2 g

Biotin is a water-soluble B-complex vitamin, also known as vitamin B7 or vitamin H. It binds to the biotin-binding pockets of streptavidin, Strep-Tactin, and Strep-TactinXT with different affinities. As a result, it allows the efficient elution of Strep-tagII or Twin-Strep-tag fusion proteins from Strep-TactinXT, while maintaining the reusability of the resin. It can be used for preparation of Strep-TactinXT elution buffer, Buffer BXT. In addition, biotin can be used for elution of biotinylated proteins from Strep-Tactin, where it binds irreversibly to the resin. Hence, Strep-Tactin cannot be regenerated in this kind of application.

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Sigma Aldrich Fine Chemicals Biosciences Biotin, 58-85-5, MFCD00005541, 1g

Empirical Formula (Hill Notation) C10H16N2O3S, ≥99% (HPLC), Molecular Weight 244.31, lyophilized powder, Synonym: D-Biotin, Bios II, Coenzyme R, Vitamin B7, Vitamin H; Biotin may be used to elute proteins from avidin/streptavidin resins.

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