What contains an antenna complex and a reaction center?
The pigment system of heliobacteria is simple: it consists of a single pigment–protein complex that is embedded in the cytoplasmic membrane and contains both the reaction center (RC) and BChls that have an antenna function.
What is also called a light-harvesting complex?
The light-harvesting complex (or antenna complex; LH or LHC) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem. Chlorophyll a is known as the core pigment.
What is a Photocomplex?
The combination of light-harvesting pigments and pigment-binding proteins is called the photocomplex and always occur within a membrane. The pigments in the reaction center participate directly in the reactions involved in converting light energy to chemical energy.
What is the difference between light-harvesting complex and photosystem?
A photosystem consists of a light-harvesting complex and a reaction center. Pigments in the light-harvesting complex pass light energy to two special chlorophyll a molecules in the reaction center.
What are the pigments in antenna complex?
The principle antenna pigments are chlorophyll a and b in plants, chlorophyll c in some algae, and bacteriochlorophyll a, b, or c in bacteria. Other pigments, called accessory pigments, are carotenoids and phycobiliproteins.
What is the difference between antenna complex pigments and reaction center pigments?
The antenna complex pigment can only reflect light. c. The reaction center pigment loses an electron when it absorbs light.
What is the main role of pigments in light harvesting complexes?
What is the function of the pigment molecules in a light-harvesting complex in the thylakoid membranes? They absorb and transfer light energy to the reaction-center chlorophyll.
How many types of light-harvesting complex are there?
In most purple bacteria, the photosynthetic membranes contain two types of light-harvesting complexes: light harvesting complex I (LH-I) and light harvesting complex II (LH-II) [1].
What is bacteriochlorophyll and Bacterioviridin?
A substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants. A type of chlorophyll that is used by photosynthetic bacteria. Many of these bacteria also use bacterioviridin for photosynthetic purposes.
Is bacteriochlorophyll and Bacteriopurpurin same?
These are not same but are related. Bacteria possess two types of related pigments— bacteriochlorophyll and bacterioviridin (= chlorobium chlorophyll).
What is the function of photosynthetic pigments in the light-harvesting complex?
Photosynthetic pigment-protein complexes (PPCs) are a vital component of the light-harvesting machinery of all plants and photosynthesizing bacteria, enabling efficient transport of the energy of absorbed light towards the reaction centre, where chemical energy storage is initiated.
Is chlorophyll a in the antenna complex?
The antenna complex is a light-harvesting membrane-associated aggregate of proteins and photosensitive pigments such as chlorophyll and carotenoids.