Talk about thylakoid membrane.

Lipid bilayer contains a little amount of phospholipids and a high amount of specific glycolipids called monogalactosyl diacylglycerol. Two fatty acids of this molecule are unsaturated so membrane is fluid enough to allow interaction between photosynthetic chain elements, Among the membrane proteins the ATP synthase is present(cF1 stromal face cF0 intrinsic) organization is similar to the IMM one, intermembrane space of thylakoid is called lumen.