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. Author manuscript; available in PMC: 2009 Nov 1.
Published in final edited form as: Methods. 2008 Oct 16;46(3):143–151. doi: 10.1016/j.ymeth.2008.09.025

Table 2.

High Affinity Calcium Indicators

Indicator Kd for Ca2+ (nM) Excitation (nm), emission (nm) Notes Reference
Calcium Green-1 190 490ex 531 em single wavelength (39, 40)
Fluo-3 325 506 ex 526 em single wavelength (41, 42)
Fluo-4 345 494 ex 516 em single wavelength (43-45)
Fura-2 145 363/335 ex 512 em dual excitation/ single emission (39, 46, 47)
Indo-1 230 488 ex 405/485 em single excitation/dual emission (47)
Oregon Green 488 Bapta-1 170 488 ex 520 em single long wavelength (48)
Fura-4F 0.77 336/366 ex, 511em Ratiometric Exitation / Single emission (49)
Fura-5F 0.40 336/363 ex, 512em Ratiometric Exitation / Single emission (50)
Calcium Crimson 185 590ex 615 em single long wavelength (39)
X-rhod-1 0.7 580 ex,602 em Single excitation/emission (51, 52)