He also developed fluorescent indicators of calcium ions and other ions important in biological processes .
Tsien contributed to the fields of cell biology and neurobiology by discovering genetically programmable fluorescent tags , thereby allowing scientists to watch the behavior of molecules in living cells in real time .
Tsien also developed fluorescent indicators of calcium ions and other ions important in biological processes .
Tsien contributed to the fields of cell biology and neurobiology by discovering genetically programmable fluorescent tags , thereby allowing scientists to watch the behavior of molecules in living cells in real time .