Covalent modification of the catalytic sites of the H+-ATPase from chloroplasts, CF0F1, with 2-azido- ADP Modification of the catalytic site 2 and the catalytic site 3 impairs multi-site, but not uni-site catalysis of both ATP synthesis and ATP hydrolysis Possmayer, F.E.; Hartog, A.F.; Berden, J.A.; Graeber, P. Biochimica et Biophysica Acta 1459(1): 202-217, 20 July 2000 https://eurekamag.com/research/034/659/034659900.php