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Unformatted text preview: hyll a molecules as
well as primary electron acceptor
- photosystems trap photons of light and use the
energy to oxidize a reaction centre chlorophyll, with the
electron being transferred to the primary electron
acceptor 4 Light Harvesting Complex
– 300 Chlorophyll a (1 reaction centre chl
a) and other accessory pigments (chls,
carots, etc..) 1202B • Content varies according to specific
organisms BIOLOGY • Antenna Pigments • Reaction Centre Pigments - 2 different photosystems: photosystem I (PSI) and
photosystem II (PSII)
- specialized chlorophyll a in the reaction centre of
photosystem I is called P700 (because its absorption
maximum is at a wavelength of 700nm
- the reaction centre of photosystem II contains a
specialized chlorophyll a P680 (absorb light maximally
at 680 nm) – Chlorophyll a P700 and P680
22-Jan-13 Gardiner 13 • In the thylakoid membrane, chlorophyll is
organized along with proteins and smaller
organic molecules into photosystems.
• A photosystem acts like a l...
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