Table 2.

Intensity decay analysis before and after photobleaching of Fura–2.

Condition	τ1 (ns)b	τ2 (ns)b	α1	f1a	Δα1	Δf1
Free form
Before	0.33	1.21	0.321	0.116	-	-
After	0.33	1.21	0.453	0.186	0.132	0.070
Ca2+-bound form
Before	0.27	1.73	0.166	0.030	-	-
After	0.27	1.73	0.358	0.080	0.192	0.050

^aFractional intensity f_i =α_iτ_i/Σ_jα_jτ_j.

^bThe decay times were global parameters.