megahseet - cyclic and non-cyclic phosphorylation

contains cyclic cycle (part 1) and non-cyclic cycle (part 2)

Cyclic and non-cyclic phosphorylation - location

thylakoid membrane of chloroplast

lumen characteristics (2)

high [H+], low pH (acidic)

stroma characteristics (2)

low [H+]. high ph (basic)

transmembrane proteins in cylcic cycle (3)

B6F, photosystem I, atp synthase

transmembrane proteins in non-cyclic cycle (5)

photosystem II, B6F, photosystem I, NADP+ reductase, atp synthase

transmembrane proteins also known as…

proton pump, enzyme

cyclic cycle phosphorylation - step I

photosystem I - light energy from photons (700nm) excites electrons

cyclic cycle phosphorylation - step 2

electron - transferred to B6F (proton pump)

cyclic cycle phosphorylation - step 3

energy from electron - used to move 1 proton down its concentration gradient - stroma > lumen

cyclic cycle phosphorylation - step 3 explanation

proton movement > active transport, which requires energy - energy used from electrons

cyclic cycle phosphorylation - step 4

after proton is carried across membrane - electron's energy depleted

cyclic cycle phosphorylation - step 5

electron - transferred back to photosystem I to recharge

cyclic cycle vs non cyclic cycle

cyclic cycle - electron is reused non cyclic cycle - electron is not reused

non - cyclic cycle phosphorylation - step 1

H2O - oxidized (split) by photons (680nm)

non - cyclic cycle phosphorylation - step 1 result

releases electron to photosystem II, O2 created as a byproduct

non - cyclic cycle phosphorylation - step 2

photosystem II - light energy from photons (680nm) excites electrons

non - cyclic cycle phosphorylation - step 4

electron - transferred to B6F (proton pump)

non - cyclic cycle phosphorylation - step 5

energy from electron - moves a proton down its concentration gradient (stroma > lumen)

non - cyclic cycle phosphorylation - step 6

electron - low energy - transferred to photosystem I

non - cyclic cycle phosphorylation - step 7

photosystem I - ligh energy from photons (700nm) recharges electron

non - cyclic cycle phosphorylation - step 8

electron - transferred from photosystem I to final electron acceptor NADP+

non - cyclic cycle phosphorylation - step 8.1

NADP+ reductase (enzyme) - reduces electron with NADP+ > NADPH

non - cyclic cycle phosphorylation - step 9

high [H+] in lumen - carried to stroma by atp synthase along its concentration gradient

non - cyclic cycle phosphorylation - step 9 explanation

proton [H+} - polar and large, needs transport chain

non - cyclic cycle phosphorylation - step 10

proton motive force - turns atp synthase

non - cyclic cycle phosphorylation - step 10.1

powers phosphorylation of adp + phosphate group > atp

non - cylic cycle phosphorylation - NADPH+

NADPH - transferred to calvin cycle