Table 3.

Mean (and SEM) Concentration (Picograms/Milligram) of Dopamine (DA), Dihydrophenylacetic Acid (DOPAC), Homovanillic Acid (HVA), and 3-Methoxytyramine (3-MT) and Metabolite/Transmitter Ratios in the Neostriatum of HDC-KO and Wild-Type Mice. P = HDC-KO Versus Wild-Type Mice t-Test for Independent Samples

	DA	DOPAC	HVA	3-MT	DOPAC/DA	HVA/DA	3-MT/DA
HDC-knockout mice
Mean	29,395.54	1666.32	1617.21	1174.81	0.0564	0.0551	0.0401
SEM	513.88	133.51	54.34	20.87	0.0042	0.0018	0.0011
Wild-type mice
Mean	28,463.30	1258.73	1591.82	1205.59	0.0443	0.0561	0.0424
SEM	354.75	133.10	61.29	37.89	0.0047	0.0023	0.0012
P =	0.160	0.054	0.775	0.528	0.088	0.769	0.213