Interactions of CF1, the coupling factor of photophosphorylations, with chloroplast lipids. Monolayers studies.

Surface pressure and surface potential of monolayers at a water-air interface show no polar interactions between the chloroplast total lipids and the polar protein CF1. The two components are perfectly miscible in mixed monolayers. It follows that CF1 interacts with the hydrophobic parts of the lipid molecules and that, in vivo, CF1 could penetrate in the hydrophobic core of the membranes.