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APC
Allophycocyanin
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 high quantum efficiency. It is a protein which can be easily linked to antibodies and other proteins by conventional protein cross-linking techniques without altering its spectral characteristics. Allophycocyanin is the least stable among the major phycobiliproteins, susceptible to dissociation at low concentrations including concentrations at which some assays are performed. CL-APC is chemically cross-linked between α and β subunits, and is much more stable than APC. The crosslinked allophycocyanin has improved stability in aqueous solution.
<p>Allophycocyanin (APC)&nbsp;is a&nbsp;protein&nbsp;from the light-harvesting&nbsp;phycobiliprotein&nbsp;family, along with&nbsp;phycocyanin,&nbsp;phycoerythrin&nbsp;and&nbsp;phycoerythrocyanin. It is an&nbsp;accessory pigment&nbsp;to&nbsp;chlorophyll. All phycobiliproteins are water-soluble and therefore cannot exist within the membrane like&nbsp;carotenoids, but aggregate forming clusters that adhere to the membrane called&nbsp;phycobilisomes. Allophycocyanin absorbs and emits red light, and is readily found in&nbsp;Cyanobacteria, and&nbsp;red algae. Phycobilin pigments have excellent fluorescent properties that are extremely useful for flow cytometry-based immunoassays.</p>
<p>Allophycocyanin (APC)&nbsp;is a&nbsp;protein&nbsp;from the light-harvesting&nbsp;phycobiliprotein&nbsp;family, along with&nbsp;phycocyanin,&nbsp;phycoerythrin&nbsp;and&nbsp;phycoerythrocyanin. It is an&nbsp;accessory pigment&nbsp;to&nbsp;chlorophyll. All phycobiliproteins are water-soluble and therefore cannot exist within the membrane like&nbsp;carotenoids, but aggregate forming clusters that adhere to the membrane called&nbsp;phycobilisomes. Allophycocyanin absorbs and emits red light, and is readily found in&nbsp;Cyanobacteria, and&nbsp;red algae. Phycobilin pigments have excellent fluorescent properties that are extremely useful for flow cytometry-based immunoassays.</p>
protocol
Protocol
COA
CatalogSize
Price
Quantity
25541 mg
Price
255510 mg
Price
 
Physical properties
Molecular weight~105000
SolventWater
Spectral properties
Correction factor (280 nm)0.195
Extinction coefficient (cm -1 M -1)
730000
Excitation (nm)651
Emission (nm)660
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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Page updated on September 27, 2025