Words similar to lhcii
Example sentences for: lhcii
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Resolution of the structure of native LHCII at 3.4 Å [ 29 ] revealed locations of individual Chls but did not provide identification of the Chl in each site or whether any site in the complex has mixed occupancy.
Consistent with this prediction, a position in CP29, a minor LHCII, was preferentially filled during reconstitution by Chl a when the amino acid residue was the normal Glu, in an ion-pair with a bound Ca ++ion, but occupancy was shifted toward Chl b when the ligand was a weaker base, the amide group of Gln [ 31 ] . Although the on-rate for Chl b may be slower than that for Chl a, because binding may be impeded by a water molecule more strongly coordinated to the central Mg atom of Chl b, the greater Lewis acid strength of Chl b allows more stable bonds with the weaker ligands.
Chl, chlorophyll; Chlide, chlorophyllide; Pchlide, protochlorophyllide; LHC, light-harvesting complex; LHCII, LHC associated primarily with photosystem II; LHCP, LHC apoprotein; Lhcb or Lhca, apoproteins of LHCs associated with photosystem II or I, respectively.
Our hypothesis on the biological role of Chl b should be reflected in the binding sites of Chl in LHCII.
This conclusion is derived from the equations: R + Chl ↔ R·Chl; R·Chl + Chl↔ R·Chl 2 ; R + 2Chl ↔ R·Chl 2 ; K eq = [R·Chl 2 ]/ [R] [Chl] 2. The additional molecules of Chl b in LHCII would further enhance this effect by shifting the equilibria toward complex formation.