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What are phycobiliproteins?

Phycobiliproteins are a type of water-soluble protein pigment complex found in some cyanobacteria and red algae. They are widely used in many fields because of their bright colors and optical properties. Phycobiliprotein has efficient light energy conversion capabilities, absorbing specific wavelengths of light (mainly orange to red light) and converting them into wavelengths required by algae for photosynthesis. This ability allows phycobiliproteins to play an important role in nature in capturing sunlight and enhancing the efficiency of photosynthesis.

Lamont Anderson (Colorado College), Mark Schneegurt (Wichita State University), and Cyanosite (, CC BY-SA 2.5 <>, via Wikimedia Commons

Main types of phycobiliproteins

Phycobiliproteins can be divided into several types based on their chemical structure and light absorption properties, including:

  1. Phycocyanin: The most common in cyanobacteria, it is blue.
  2. Phycoerythrin: Found in some red and cyanobacteria, it is red in color.
  3. Allophycocyanin: Usually coexisting with phycocyanin and phycoerythrin, it is dark blue to purple.

Applications of Phycobiliprotein

Biomedical field

  1. Fluorescent Labeling: The fluorescent properties of phycobiliproteins make them ideal for labeling biomolecules and cells. They are widely used in techniques such as flow cytometry and fluorescence microscopy to study cell behavior, protein interactions, and more.
  2. Immunoassay: As a fluorescent probe, phycobiliprotein can be used in various immunoassay techniques, such as ELISA, Western blot, etc., to detect the presence and quantification of specific proteins or molecules.

Food and cosmetics industry

  1. Natural Colors: Due to their bright colors and natural properties, phycobiliproteins are used as natural colors in food and beverages, especially in products looking to replace synthetic colors.
  2. Cosmetics: Phycobiliproteins are also added to cosmetics as natural pigments or antioxidants, providing protection against harmful UV rays.

Scientific research and technology applications

  1. Photodynamic therapy: Specific types of phycobiliproteins can be used in photodynamic therapy (PDT), a method that uses photosensitizers to treat cancer and other diseases.
  2. Photovoltaic devices: The light absorption and conversion capabilities of phycobiliproteins are being explored for improving photovoltaic devices, such as biosolar cells, to increase their efficiency and environmental friendliness.

As a company committed to the forefront of biotechnology, we are proud to offer high quality phycobiliproteins. By using advanced extraction and purification technologies, we ensure the purity and stability of our products, meeting the pursuit of high quality standards in scientific research, medicine, food additives and cosmetics. Our phycobiliproteins have excellent fluorescent properties and biocompatibility, making them ideal fluorescent markers for biomedical research as well as natural, safe pigment options for the food and cosmetic industries. We are committed to providing customers with high-quality phycobiliprotein products through continuous technological innovation and strict quality control, helping them achieve breakthroughs in their respective fields. In the journey of exploring the unlimited potential of phycobiliprotein, we look forward to working with global partners to jointly develop more innovative applications and contribute to human health and sustainable development.