The wondrous world of light antennas In evolution, the development of light-sensitive proteins was a momentous step: it’s only thanks to them that we can see. The large research facilities at PSI are helping scientists unravel the last major secrets concerning these extraordinary cellular components. The researchers have another goal as well: selectively switching processes in cells on and off with the help of light receptors. Text: Brigitte Osterath
Gebhard Schertler, head of the Biology and Chemistry Division at PSI, explains what h appens at the beginning of the visual process. Upon the incidence of light, the small molecule retinal in our eye changes its shape.
10
