Table 2.

Effects of EGTA on measured domain size (FWHM) and the magnitude (peak ΔF/F) of the OGB-5N fluorescence transients

[EGTA]10/50 μm500 μm2 mm
FWHM (μm)
 mean ± SD*1.54  ± 0.69*1.69  ± 0.58*1.51  ± 0.52
n  9  3  9
Peak ΔF/F
 mean ± SD**0.14  ± 0.06**0.18  ± 0.13**0.12  ± 0.05
n  16  7  17
  • Peak ΔF/F is the averaged maximum ΔF/F of transients measured at a single spot location or the averaged maximum ΔF/F of the three or four largest transients from a scan. Only traces exhibiting a time-to-peak of <2 msec and a rapid decay time constant were used for further analysis of peak ΔF/F. *p > 0.7; **p > 0.2; Student’st test.