Table 1. Matrix effect in Raw 264.7, RBL-2H3 and Jurkat T-cell extracts.

		Matrix effect (% ± SD) a
GroPIns spiked conc. in matrix (ng/ml)	Raw 264.7	RBL-2H3	Jurkat
10	86.94 ±0.62	104.31 ±2.90	102.32 ±6.02
20	85.59 ±0.05	112.44 ±2.19	105.34 ±1.84
40	87.55 ±2.01	113.70 ±1.09	107.93 ±2.54
80	86.94 ±1.59	113.47 ±0.94	111.03 ±1.33
160	86.59 ±1.05	109.10 ±3.13	114.87 ±0.11

^aEach point is based on five replicates.