megasheet - cyclic cycle phosphorylation (part 1)

contains cyclic cycle (part 1/2)

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 also known as…

proton pump, enzyme

cyclic cycle vs non cyclic cycle

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

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