A complex located in a photosynthetic membrane that consists of a photoreaction center associated with accessory pigments and electron carriers. Examples of this component are found in Arabidopsis thaliana and in photosynthetic bacterial and archaeal species. [ https://www.worldcat.org/search?q=bn%3A0140514031 http://www.ncbi.nlm.nih.gov/pubmed/9821949 ]