Light Harvesting Complex

In purple bacteria

Purple bacteria are a type of photosynthetic organism with a light harvesting complex consisting of two pigment protein complexes, referred to as LH1 and LH2. Within the photosynthetic membrane, these two complexes differ in their arrangement. The LH1 complexes surround the reaction centre, while the LH2 complexes are arranged peripherally around the LH1 complexes and the reaction centre. Purple bacteria use bacteriochlorophyll and carotenoids to gather light energy. These proteins are arranged in a ring-like fashion, creating a cylinder that spans the membrane.