The cell-impermeant visible light—excitable, low affinity Ca2+ indicator, Oregon Green™ 488 BAPTA-5N, hexapotassium salt has a Kd for Ca2+ ∼20Read more
The cell-impermeant visible light—excitable, low affinity Ca2+ indicator, Oregon Green™ 488 BAPTA-5N, hexapotassium salt has a Kd for Ca2+ ∼20 μM and absorption/emission maxima ∼492/517 nm.