Change of purple membranes geometry induced by protein adsorption.

  title={Change of purple membranes geometry induced by protein adsorption.},
  author={Alexandar Metodiev Zhivkov},
  journal={Colloids and surfaces. B, Biointerfaces},
  volume={56 1-2},
Earlier it was an orthodoxy that purple membranes (PMs) in aqueous medium are shaped as flat hard disks. In a few newer articles it has been shown that PMs are bent and their curvature varies with surface charge density. The purpose of this work is to answer which is the dominant factor for PM bending--structural or electrostatic forces. Two positively charged proteins are used: phytohemagglutinin (PhHA) and protamine. The electrophoretic mobility and electric polarizability of PMs are measured… CONTINUE READING