Excitation transfer connectivity in different purple bacteria: A theoretical and experimental study

►Cross-section enhancement brought about by antenna connectivity ranges from 1.5 to 3 ►In Rhodobacter sphaeroides (closed RCs) the excitation visits ~ two dimeric complexes ►Effective transfer between core complexes is markedly slower than generally believed ►Chemical-kinetics-like and more refined modeling of excitation migration are in good agreement