Description

R-Phycoerythrin is a brilliant red, fluorescent phycobiliprotein pigment derived from red algae, with the CAS registry number 11016-17-4. This high-value biomolecule is prized for its exceptional brightness and large Stokes shift, making it an indispensable tool in advanced life science research and diagnostics. It is primarily utilized by biotechnology, pharmaceutical, and diagnostic industries for applications requiring sensitive detection and labeling.

Application

• Flow Cytometry: As a superior fluorescent label for cell surface marker detection and immunophenotyping.
• Immunoassays & Diagnostics: Used in ELISA, lateral flow assays, and other platforms for high-sensitivity detection.
• Fluorescence-Activated Cell Sorting (FACS): Enables precise isolation of specific cell populations based on fluorescence.
• Fluorescence Microscopy: Serves as a powerful tag for imaging and localization studies in cellular biology.
• Bioconjugation: Acts as a bright, stable fluorophore for creating antibody, protein, or peptide conjugates.
• Biosensor Development: Incorporated into systems for detecting biological interactions and analytes.
• Marine & Environmental Research: Used as a natural marker in phytoplankton studies and oceanography.

Basic Information

Product Name	R-Phycoerythrin
CAS No.	11016-17-4
Molecular Formula	Contact for details
Molecular Weight	~240,000 Da (approximate, varies by source and purity)
Synonyms	R-PE; B-PE; B-Phycoerythrin; Phycoerythrin R; C-Phycoerythrin (from certain sources); R-Phycoerythrin from Porphyridium cruentum; Phycoerythrobilin protein; Algal R-phycoerythrin
EINECS	Contact for details

Quality Control

Our R-Phycoerythrin is produced and tested under stringent conditions to ensure batch-to-batch consistency and performance. Each lot is characterized for critical parameters including purity (A565/A280 ratio), fluorescence intensity, and conjugate suitability. Certificates of Analysis (COA) detailing specifications and test results are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. For long-term stability, store lyophilized powder at 2-8°C. Reconstituted solutions should be aliquoted and stored at ≤ -20°C to prevent activity loss. Avoid repeated freeze-thaw cycles.

Specification

Item	Specification
Appearance	Dark red to purple powder or solution
Purity (A565/A280)	> 4.0 (Research Grade)
Absorption Maximum (λmax)	~565 nm, 498 nm, 545 nm
Emission Maximum (λmax)	~578 nm
Extinction Coefficient (ε)	~1.96 x 106 M-1cm-1 at 565 nm
Fluorescence Quantum Yield	> 0.8
Protein Content	> 95% (by HPLC)
Solubility	Soluble in aqueous buffers (PBS, pH 7.2-7.4)
Biological Activity	Suitable for conjugation and flow cytometry

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.