Quin 2 is a fluorescent probe for calcium, developed by R. Y. Tsien et al. Because of its high sensitivity with calcium, care should be taken not to contaminate with calcium from other reagents, water or vessels.
Free type is also available.
P. M. Hinkle, E. D. Shanshala II, E. J. Nelson, Measurement of intracellular cadmium with fluorescent dyes. Further evidence for the role of calcium channels in cadmium uptake, J. Biol. L. Homolya, Z. Hollo, U. A. Germann, I. Pastan, M. M. Gottesman, B. Sarkadi, Fluorescent cellular indicators are extruded by the multidrug resistance protein, J. Biol. J. R. Lakowicz, H. Szmacinski, K. Nowaczyk, W. J. Lederer, M. S. Kirby, Ml. M. J. Burkitt, L. Milne, S. Y. Tsang, S. C. Tam, Calcium indicator dye Quin2 inhibits hydrogen peroxide-induced DNA strand break formation via chelation of iron, Arch.