Chloroplastthylakoidmembranesaccommodatedenselypackedproteincomplexesinordered,oftensemi-crystallinearraysandareassembledintohighlyorganizedmultilamellarsystems,anorganizationwarrantingasubstantialdegreeofstability.Atthesametime,theyexhibitremarkablestructuralflexibility,whichappearstoplayi