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ReadiUse™ Preactivated APC-iFluor® 750 Tandem

Flow cytometry analysis of whole blood cells stained with APC/iFluor® 750 anti-human CD4 antibody (Clone: SK3). The fluorescence signal was monitored using an Aurora spectral flow cytometer in the APC/iFluor® 750 specific R7-A channel.
Flow cytometry analysis of whole blood cells stained with APC/iFluor® 750 anti-human CD4 antibody (Clone: SK3). The fluorescence signal was monitored using an Aurora spectral flow cytometer in the APC/iFluor® 750 specific R7-A channel.
Flow cytometry analysis of whole blood cells stained with APC/iFluor® 750 anti-human CD4 antibody (Clone: SK3). The fluorescence signal was monitored using an Aurora spectral flow cytometer in the APC/iFluor® 750 specific R7-A channel.
Flow cytometry analysis of PBMC stained with APC-iFluor® 750 anti-human CD3 *UCHT1* conjugate. The fluorescence signal was monitored using an Aurora spectral flow cytometer in the APC-iFluor® 750 specific R7-A channel.
Spectrum for APC-iFluor 750
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Physical properties
Molecular weight~105000
SolventWater
Spectral properties
Extinction coefficient (cm -1 M -1)700000
Excitation (nm)651
Emission (nm)791
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageRefrigerated (2-8 °C); Minimize light exposure
UNSPSC12171501
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OverviewpdfSDSpdfProtocol


Molecular weight
~105000
Extinction coefficient (cm -1 M -1)
700000
Excitation (nm)
651
Emission (nm)
791
Allophycocyanin (APC) is a phycobiliprotein isolated from Spirulina sp., a blue-green alga. Like other phycobiliproteins, APC is fluorescent, with an extremely high absorptivity and a high quantum efficiency. Our APC-iFluor® 750 Tandem is an excellent replacement for APC-Cy7® and APC-Alexa Fluor® 750 Tandem due to their similar spectral properties. Our APC-iFluor® 750 Tandem is more photostable than APC-Cy7® Tandem. ReadiUse™ Preactivated APC-iFluor® 750 Tandem is an activated APC protein, and can be easily conjugated to antibodies with much higher conjugation yield than the conventional APC.

Components


Example protocol


SAMPLE EXPERIMENTAL PROTOCOL

Preparation of pre-activated antibody with Buccutite™ MTA
  1. Reconstitute Buccutite™ MTA in DMSO at ~10 mg/mL.
    Note     Please store unused Buccutite™ MTA at -20 °C and could be used up to two freeze and thaw cycles.
  2. Prepare target antibody (Ab) in pH = 8.5 - 9.0 buffer at concentration above 1 mg/mL.
  3. Add Buccutite™ MTA to Ab solution at the ratio of 8 - 10 µg Buccutite™ MTA/100 µg Ab.
  4. Mix well and react at room temperature for 60 minutes, rotating during the reaction.
  5. Purify the reaction mixture with desalting column to remove unreacted Buccutite™ MTA and exchange buffer to PBS or buffer of your choice.
  6. Collect the Buccutite™ MTA-activated Ab, and estimate the concentration by 70% yield of the original starting amount. 

Conjugation with pre-activated APC-iFluor™ 750 Tandem
  1. Reconstitute pre-activated APC-iFluor™ 750 Tandem in 100 µL ddH2O to 10 mg/mL.
    Note     Reconstituted pre-activated APC-iFluor™ 750 Tandem could be stored at 4 °C for one month, kept from light.
  2. Add APC-iFluor™ 750 Tandem directly to MTA-activated target Ab solution at the ratio of 130 µg APC-iFluor™ 750 Tandem/100 µg MTA-activated Ab.
  3. Rotate the mixture for 60 minutes at room temperature.
  4. The Ab/APC-iFluor™ 750 Tandem conjugates are now ready to use.
    Note      The antibody conjugate should be stored at > 0.5 mg/mL in the presence of a carrier protein (e.g., 0.1% bovine serum albumin) and 0.02% - 0.05% sodium azide. The Ab/APC-iFluor™ 750 Tandem conjugates solution could be stored at 4 °C for up to two months, and kept from light.
  5. (Optional) Ab/APC-iFluor™ 750 Tandem conjugates could be further purified through size exclusion chromatography to get best performance. 

Spectrum


Open in Advanced Spectrum Viewer
spectrum

Spectral properties

Extinction coefficient (cm -1 M -1)700000
Excitation (nm)651
Emission (nm)791

Product Family


NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)
ReadiUse™ Preactivated APC-iFluor® 700 Tandem651710700000
ReadiUse™ Preactivated APC-iFluor® 800 Tandem651819700000
ReadiUse™ Preactivated PE-iFluor® 750 Tandem5657781960000

Images


References


View all 46 references: Citation Explorer
Chromophore attachment to phycobiliprotein beta-subunits: phycocyanobilin:cysteine-beta84 phycobiliprotein lyase activity of CpeS-like protein from Anabaena Sp. PCC7120
Authors: Zhao KH, Su P, Li J, Tu JM, Zhou M, Bubenzer C, Scheer H.
Journal: J Biol Chem (2006): 8573
Excitation energy transfer from phycobiliprotein to chlorophyll d in intact cells of Acaryochloris marina studied by time- and wavelength-resolved fluorescence spectroscopy
Authors: Petrasek Z, Schmitt FJ, Theiss C, Huyer J, Chen M, Larkum A, Eichler HJ, Kemnitz K, Eckert HJ.
Journal: Photochem Photobiol Sci (2005): 1016
Single-molecule spectroscopy selectively probes donor and acceptor chromophores in the phycobiliprotein allophycocyanin
Authors: Loos D, Cotlet M, De Schryver F, Habuchi S, Hofkens J.
Journal: Biophys J (2004): 2598
Isolation and characterisation of phycobiliprotein rich mutant of cyanobacterium Synechocystis sp
Authors: Prasanna R, Dhar DW, Dominic TK, Tiwari ON, Singh PK.
Journal: Acta Biol Hung (2003): 113
Evaluation of Tolypothrix germplasm for phycobiliprotein content
Authors: Prasanna R, Prasanna BM, Mohammadi SA, Singh PK.
Journal: Folia Microbiol (Praha) (2003): 59
Co-ordinated expression of phycobiliprotein operons in the chromatically adapting cyanobacterium Calothrix PCC 7601: a role for RcaD and RcaG
Authors: Noubir S, Luque I, Ochoa de Alda JA, Perewoska I, T and eau de Marsac N, Cobley JG, Houmard J.
Journal: Mol Microbiol (2002): 749
Phycobiliprotein genes of the marine photosynthetic prokaryote Prochlorococcus: evidence for rapid evolution of genetic heterogeneity
Authors: Ting CS, Rocap G, King J, Chisholm SW.
Journal: Microbiology (2001): 3171
Phycobiliprotein-Fab conjugates as probes for single particle fluorescence imaging
Authors: Triantafilou K, Triantafilou M, Wilson KM.
Journal: Cytometry (2000): 226
Novel activity of a phycobiliprotein lyase: both the attachment of phycocyanobilin and the isomerization to phycoviolobilin are catalyzed by the proteins PecE and PecF encoded by the phycoerythrocyanin operon
Authors: Zhao KH, Deng MG, Zheng M, Zhou M, Parbel A, Storf M, Meyer M, Strohmann B, Scheer H.
Journal: FEBS Lett (2000): 9
Phycobiliprotein and fluorescence immunological assay
Authors: Wu P., undefined
Journal: Sheng Li Ke Xue Jin Zhan (2000): 82