| Abstract: | The interaction of erythrocyte ghosts and vesicles with chromatographed hemoglobin (Hb) A and Hb S was studied under various conditions. Although no binding of either Hb A or Hb S to inside-out vesicles was detected, under conditions of physiological ionic strength and pH, several properties of white membrane ghosts were effected by the presence of Hb. Addition of Hb A and Hb S (2 g/dl) to membrane ghosts in 6 mM MgATP, 150 mM NaCl, 10 mM Tris-HCl buffer, pH 7.4, was found to effect the echinocyte-discocyte transition, the extent of endocytosis, the volume, and the sealing of ghosts. Our observations suggest that the structure of membrane ghosts is influenced by cytosol proteins and that the environment of the red cell membrane plays an important role in the definition and the control of the membrane structure and function. |
