Table 2.

The Number of Cells Responding to Various Physiological Stimuli in Different Passages of Human Embryonic Stem Cell-Derived Neural Precursors (P6–P10 NPs)

Number of cells tested	P6 NPs n=44	P7 NPs n=44	P8 NPs n=45	P9 NPs n=45	P10 NPs n=44
Cells sensitive to 1 or more of applied stimuli	41%±1.6%	59%±2.5%	49%±1.1%	15%±1.7%	7%±0.2%
K+ 50 mM	11%±1%	50%±3.9%	32%±4%	4%±2.2%	2.3%
ATP 100 μM	7%±1%	46%±2.2%	24%±3.5%	9%±1.9%	5%±2.3%
Glutamate 50 μM	27%±1.3%	57%±0.3%	9%±1.3%	4%±2.2%	0
GABA 10 μM	7%±1%	5%±2.3%	16%±1.1%	0	0
Caffeine 20 mM	4%±2%	18%±2.1%	16%±1.1%	4%±2.1%	2.3%

ATP, adenosine-5′-triphosphate.