Search results
Results From The WOW.Com Content Network
They are unique among the photosynthetic pigments in that they are bonded to certain water-soluble proteins, known as phycobiliproteins. Phycobiliproteins then pass the light energy to chlorophylls for photosynthesis .
Given their large range of applications and potential uses, researchers have been trying to find and develop ways to produce and purify phycobiliproteins to meet the growing demand for them. [18] One such phycobiliprotein is C-phycocyanin (C-PC), which is found in spirulina. A limiting factor of C-PC's usage in these applications is its protein ...
Phycobiliprotein MW Ex (nm) / Em (nm) Quantum yield Molar Extinction Coefficient (M −1 cm −1) Comment Image R-Phycoerythrin (R-PE) 240 498.546.566 nm / 576 nm 0,84 1.53 10 6: Can be excited by Kr/Ar laser Applications for R-Phycoerythrin. Many applications and instruments were developed specifically for R-phycoerythrin.
Phycoerythrin (PE) is a red protein-pigment complex from the light-harvesting phycobiliprotein family, present in cyanobacteria, [1] red algae [2] and cryptophytes, [3] accessory to the main chlorophyll pigments responsible for photosynthesis.The red pigment is due to the prosthetic group, phycoerythrobilin, which gives phycoerythrin its red color.
Phycocyanin is a pigment-protein complex from the light-harvesting phycobiliprotein family, along with allophycocyanin and phycoerythrin. [1] It is an accessory pigment to chlorophyll . All phycobiliproteins are water-soluble, so they cannot exist within the membrane like carotenoids can.
The pigments in photoreceptor proteins either change their conformation or undergo photoreduction when they absorb a photon. [3] This change in the conformation or redox state of the chromophore then affects the protein conformation or activity and triggers a signal transduction cascade. [3] Examples of photoreceptor pigments include: [4]
Each phycobiliprotein has a specific absorption and fluorescence emission maximum in the visible range of light. Therefore, their presence and the particular arrangement within the phycobilisomes allow absorption and unidirectional transfer of light energy to chlorophyll a of the photosystem II. In this way, the cells take advantage of the ...
A recipe from 1688 described the cosmetic as a mixture of water, vinegar, and lead. [5] The cosmetic's use of white lead as a pigment was detrimental to the human body and caused lead poisoning, skin damage, hair loss and in some cases eventual death. [1] [4]