This paper gives an overview of a lecture scheduled for the opening of
the 10th European Bioenergetics Congress. In this lecture I plan to f
irst reflect on the accomplishments of some of the individuals who wer
e involved in research on the ATP synthase during the past 50 years. T
hen I will give a brief view of the present information about rotation
al catalysis by the ATP synthase. This will be followed by a discussio
n of some results from my laboratory that call for additional experime
ntation. Finally I will direct attention to other questions about the
ATP synthase that should be addressed in future studies. (C) 1998 Else
vier Science B.V.