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1. cDNA of the human dopamine transporter (hDAT) was cloned into a cloning vector based on the Semliki Forest virus. Electroporation of in vitro transcribed mRNA from this plasmid into BHK-21 cells resulted in production of the transporter as measured by [3H]dopamine uptake (Km = 2.0 +/- 0.4 microM), which was specifically inhibited in the presence of cocaine. 2. The recombinant transporter protein exhibited an apparent molecular mass of 56 kDa, which was reduced to 50 kDa after tunicamycin treatment of the producing BHK-21 cells. Tunicamycin treatment of the electroporated cells also resulted in a decrease in transport activity with no change in the Km value (2.1 +/- 0.4 microM). 3. The localization of the heterologously produced transporter in the BHK cells either with or without tunicamycin treatment was studied by electron microscopic immunogold staining. The glycosylated transporter was found to be localized at the plasma membrane, whereas in the case of the unglycosylated transporter, transport to the plasma membrane was blocked.
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T Lenhard, and
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European journal of biochemistry,
T Lenhard, and
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T Lenhard, and
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January 2009,
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T Lenhard, and
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Morfologiia (Saint Petersburg, Russia),
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T Lenhard, and
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B Lingen, and
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H Reiländer
April 1991,
Seminars in hematology,
T Lenhard, and
K Marheineke, and
B Lingen, and
W Haase, and
R Hammermann, and
H Michel, and
H Reiländer
July 1999,
Cytotechnology,
T Lenhard, and
K Marheineke, and
B Lingen, and
W Haase, and
R Hammermann, and
H Michel, and
H Reiländer
July 2001,
Biochemical and biophysical research communications,
T Lenhard, and
K Marheineke, and
B Lingen, and
W Haase, and
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January 1994,
Molecular pharmacology,
