@article {1251, title = {Primary step in bacteriorhodopsin photosynthesis: Bond stretch rather than angle twist of its retinal excited-state structure}, journal = {Journal of the American Chemical Society}, volume = {120}, number = {34}, year = {1998}, note = {Song, L El-Sayed, MA}, month = {Sep}, pages = {8889-8890}, isbn = {0002-7863}, doi = {10.1021/ja980390d}, author = {Song, Li and El-Sayed, Mostafa A} }