What is light harvesting complex and difference between PS-1 and PS-2
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In all photosynthetic system, pigment molecules are bound to proteins forming pigment-protein complexes called pigment system or photosystem.
Pigment system divided into two components:-
1.) Photochemical reaction center- carries out photochemical reactions nd contain pair of chlorophyll a molecule.
2.) Antenna complex- consist of no. of distinct pigment- protein complexes known as Light Harvesting complex.
In higher plants, LHC consist chlorophyll a, chlorophyll b and carotenoid. The antenna complex captures the light nd feeds it to reaction center by a process called resonance energy transfer.
Photosystem are of two types:-
1.) Photosystem-1 (PS-1)
#It is a protein pigment complex that uses light energy to mediate electron transfer from plastocyanin to ferrodoxin.
#It contains chl a, carotenoid, phylloquinones, Fe-S centers.
#It is driven by light of wavelength 700nm.
#PS-1 is also called as P700 because of it's wavelength.
# It is found in non-appressed membranes of grana thylakoid and stroma thylakoid.
2.) Photosystem-2 (PS-2):-
#It is driven by light of wavelength 680 nm.
#It is also known as P680.
# In higher plants, reaction center contains membrane proteins D1 and D2, cytochrome b559, chl a, plastoquinone, plastocyanin.
#It is located in the apperessed membrane of grana thylakoid.
Pigment system divided into two components:-
1.) Photochemical reaction center- carries out photochemical reactions nd contain pair of chlorophyll a molecule.
2.) Antenna complex- consist of no. of distinct pigment- protein complexes known as Light Harvesting complex.
In higher plants, LHC consist chlorophyll a, chlorophyll b and carotenoid. The antenna complex captures the light nd feeds it to reaction center by a process called resonance energy transfer.
Photosystem are of two types:-
1.) Photosystem-1 (PS-1)
#It is a protein pigment complex that uses light energy to mediate electron transfer from plastocyanin to ferrodoxin.
#It contains chl a, carotenoid, phylloquinones, Fe-S centers.
#It is driven by light of wavelength 700nm.
#PS-1 is also called as P700 because of it's wavelength.
# It is found in non-appressed membranes of grana thylakoid and stroma thylakoid.
2.) Photosystem-2 (PS-2):-
#It is driven by light of wavelength 680 nm.
#It is also known as P680.
# In higher plants, reaction center contains membrane proteins D1 and D2, cytochrome b559, chl a, plastoquinone, plastocyanin.
#It is located in the apperessed membrane of grana thylakoid.
royboy:
Ty very much..
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