Abstract
Predictions from the theory of transfection, Karl-Friedrich Fischbach's first paper, were confirmed 20 years later. Also a model, proposed already in 1977 by Karl-Friedrich and colleagues, to explain the nonmonotonous dependence on light intensity of phototaxis in Drosophila, finds support in recent studies of functional neuroanatomy.
ACKNOWLEDGMENTS
I am indebted to Erich Buchner, Regine Kahmann, Christopher Schnaitmann, and Thomas Trautner for helpful discussions and two unknown reviewers for their suggestions to improve the text.
Declaration of interest: The author reports no conflicts of interest. The author alone is responsible for the content and writing of the paper.