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21 Cards in this Set

  • Front
  • Back
chlorophyll a
used by plants, algae, protozoa, cyanobacteria absorb energy to photoreactive centers involved in the generation of proton-motive force for ATP synthesis.
a pigment that absorbs light, primary role is photoprotection they indirectly transfer energy to centers.
chlorophyll a
top letft is CH=CH2
phytol at bottome with hydro-C tails and active site
bacteriochlorophyll a
CH3-H to C2H5-H....reduced
top left is O=C-CH3
light absorbance spectra of chlorophylls
are complimentary
anoxigenic e- cycling and photophosphorylation
excited e-'s from chlorophyll a in the reactive center are cycled thru e- carriers and back to chlorophyll a: no donor required to generate PMF for ATP synthesis (stroma=inside, thylakoid space=outside)
photophosphorylation in purple bacteria
bacteriopheophytin=bacteriochlorophyll with Mg
pdt:ATP, 3H
light harvesting complexes
anoxygenic photosynthesis in different types of bacteria
purple: reverse e-, P870
green S: CO2 fixed, P840
heliobact:CO2 fixed, P798 (highest)
oxygenic non-cyclic photphosphorylation
(algae and higher plants)
CO2 fixation by calvin benson cycle, oxidation of H2O in thylakoid space.
redox potentials of intermediates of oxygenic photosynthesis
photosystem II: the Z scheme, noncyclic e- flow (p680)
photosystem I: cyclic e- flow, p700
photosynthesis the calvin benson cycle also RuBP or RubisCO pathway
1.rxn of enzyme ribulose bi-P carboxylase
2.conversion of 4-phosphoglyceric acid to glyceraldegyde 3-P
3.conversion of ribulose 5-P to the CO2 acceptor ribulose bi-P by phosphoribulokinase
autotrophic pathways in green bacteria
CO2 fixation by reversal of the citric acid-cyle in the green S bacterium.
3CO2 + 12H + 5ATP--->triose-P
conversion of pyruvate to phosphoenolyruvate consumes 2 P-bond equivalents
autotrophic pathways in green bacteria
CO2 fixation by reversal of the hydroxypropionate cycle in the green non-S bacteria.
2CO2 + 6H + 3ATP-->glyoxylate
carboxylated twice.
anabolism and catabolism being integrated processes
(substrate) catab (pdts)
energy generation
[ATP and PMF]
(monomers) anab (macromole)
energy consumption
polysaccharide synthesis
ADPG + glycogen=ADP + Glycogen-Glucose
biosynthesis of ribose and nucleotides
ribulose 5-P + CO2
ribose 5-P
ribonucleotides-->deoxyribo to DNA
carbon skeletons of aa
(citric acid cycle)
oxalacetate (aspartate)
carbon skeletons of aa
pyruvate (alanine)
3-Pglycerate (serine)
chorismate (aromatic)
histidinol (histidine)
nitrogen is picked up from ammonia by alpha-ketoglutarate and glutamate
nitrogens are transferred by transaminases from glutamine to organic-acid precursors of other aa, purines, pyrimidines and even sugars
biosynthesis of FA's
acetyl CoA carboxylase
acyl carrier proteins
intermediates of the calvin-benson cycle for CO2 fixation
1.ribulose bisphosphate to PGA
2.phosphoglyceric acid to biosynthesis
3.ribulose bisphosphate