Citation: Va. Romoser et al., DETECTION IN LIVING CELLS OF CA2-DEPENDENT CHANGES IN THE FLUORESCENCE EMISSION OF AN INDICATOR COMPOSED OF 2 GREEN FLUORESCENT PROTEIN VARIANTS LINKED BY A CALMODULIN-BINDING SEQUENCE - A NEW CLASS OF FLUORESCENT INDICATORS(), The Journal of biological chemistry, 272(20), 1997, pp. 13270-13274