Table 2.

Uptake studies in stable recombinant HEK cell lines

Substrate	Uptake by transfectants (dpm/µg)
	Vector	BOCT1	BOCT2	OCT1	OCTN2
MPP+	9.3 ± 0.8	9.9 ± 0.7	9.0 ± 0.4	372 ± 12*	16.9 ± 0.4
TEA	117 ± 3.9	112 ± 1.7	126 ± 7.5	223 ± 6.4*	112 ± 7.2
Carnitine	186 ± 16	209 ± 6.1	192 ± 9.6	241 ± 6.7	2,288 ± 84*
Choline	271 ± 5.2	265 ± 7.0	272 ± 20	510 ± 8.8*	297 ± 47
Histamine	24.4 ± 7.7	9.1 ± 0.8	8.0 ± 1.1	95.7 ± 4.3*	nd
Norepinephrine	29.5 ± 1.1	35.2 ± 1.7	24.1 ± 1.0	159 ± 3.2*	nd
Nicotinamide	39.0 ± 10.9	32.1 ± 2.2	27.8 ± 5.1	130 ± 9.5*	nd
Urate	4.5 ± 1.5	7.4 ± 4.3	4.5 ± 0.13	4.6 ± 2.1	nd
Ascorbate	9.0 ± 2.1	10.1 ± 1.0	5.5 ± 0.3	6.5 ± 0.7	nd

nd not done

^*Statistically significant from pFLAG vector, P < 0.05