Three beta subunits in an alpha-beta hexamer likely cycle between three conformational states, open, low, and tight.  
This protein fails to function if an aspartate residue at position 61 is modified by dicyclohexylcarbodiimide or mutated to alanine.  Three beta subunits in an alpha-beta hexamer likely cycle between three conformational states, open, low, and tight.  Its c ring causes its gamma subunit to rotate in discrete multiples of 120 degrees.  While fourteen c subunits are present in chloroplasts, ten are present in yeast mitochondria and twelve in those of animals.  Composed of F0 and F1 complexes, for 10 points, name this protein that uses energy from proton movement to add a phosphate to ADP.
This protein fails to function if an aspartate residue at position 61 is modified by dicyclohexylcarbodiimide or mutated to alanine.  
{ATP synthase} (accept {F0/F1 complex} before F0 and F1 mentioned)