Only recently has the true power of fluorescence techniques evolved for use with single living cells. The present status of the field reflects the occurrence of a revolution in cell biological research. Volume 30, along with Volume 29, provide the cell biologist with a sourcebook of methods. Volume 29 deals with the preparation, delivery, and detection of fluorescent probes. Volume 30 explores a combination of the theoretical and technical issues related to the quantitation of fluorescence signals in the living cell with a light microscope.
