what is difference between photosystem 1 and photosystem 2
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Under normal conditions, electrons flow from PS II through cytochrome bf to PSI.Photosystem I (PSI) optimally absorbs photons of wavelength of 700 nm. It is responsible for providing high energy electrons with which to reduce NADP+ to produce NADPH to be used in the Calvin cycle
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PS I is located at the outer surface of the grana thylakoid membrane (non appressed granal regions and stroma lamella).
PS II is located at the inner surface of the grana thylakoid membrane (appressed granal region).
The photocentre or reaction centre is P700.
The photocentre is P680.
PS I has an iron-sulphur (FeS) type reaction centre (or type I)
PS II has a quinone type reaction centre (also known as Q-Type or type II)
The core complex of PSI is composed by a smaller number of proteins (~15 subunits) than PSII
The core of PSII is a multi-subunit complex composed of about ~25-30 subunits.
Pigments absorb longer wavelengths of light (>680nm).
Pigments absorb shorter wavelengths of light (<680nm).
PS II is located at the inner surface of the grana thylakoid membrane (appressed granal region).
The photocentre or reaction centre is P700.
The photocentre is P680.
PS I has an iron-sulphur (FeS) type reaction centre (or type I)
PS II has a quinone type reaction centre (also known as Q-Type or type II)
The core complex of PSI is composed by a smaller number of proteins (~15 subunits) than PSII
The core of PSII is a multi-subunit complex composed of about ~25-30 subunits.
Pigments absorb longer wavelengths of light (>680nm).
Pigments absorb shorter wavelengths of light (<680nm).
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