Before revision:  Previously, electronic coherence within tightly-packed light-harvesting (LH) units or within individual reaction centers (RCs) has been recognized as an important ingredient for a complete understanding of the excitation energy transfer dynamics. However, the electronic coherence across RC and LH units has been consistently neglected as it does not play a significant role during these relatively slow transfer processes .
After revision:  Previously, electronic coherence within tightly-packed light-harvesting (LH) units or within individual reaction centers (RCs) and light-harvesting (LH) units .