Abstract: The present invention relates in general to human genetic polymorphisms and their association with human health and to methods and materials for analyzing allelic variations, and to the use of genetic polymorphisms in the diagnosis and treatment of smoking behavior and nicotine dependence. Provided herein are methods for determining risk in a subject of developing regular smoking behavior. Also provided are primers, probes, microarrays, and kits related thereto.

Abstract: A gene, flanking 5′ and 3′ sequences and derived cDNA encoding a rat D4 dopamine receptor that is predominantly located in the cardiovascular and retinal systems is disclosed. The cDNA has been expressed in transfected mammalian cells and demonstrated to preferentially bind dopamine antagonists such as clozapine. The cDNA is useful as a probe for related D4 dopamine receptors. Expressed in appropriate cell lines, it is useful as an in vitro screen for drugs which specifically bind to the receptor. Drugs that specifically bind to the receptor are then screened using standard methodology in rats, mice or dogs, for the physiological effects. Amino acids deduced from the determination of cDNA can be used to generate either polyclonal or monoclonal antibodies which recognize the D4 receptor sequence but do not recognize D1, A2, D3 or D5 donpamenergic receptors, for use in immunocytochemical studies, identification and isolation via flow sorting of D4 expressing cell types.

Abstract: A gene, flanking 5′ and 3′ sequences and derived cDNA encoding a rat D4 dopamine receptor that is predominantly located in the cardiovascular and retinal systems is disclosed. The cDNA has been expressed in transfected mammalian cells and demonstrated to preferentially bind dopamine antagonists such as clozapine. The cDNA is useful as a probe for related D4 dopamine receptors. Expressed in appropriate cell lines, it is useful as an in vitro screen for drugs which specifically bind to the receptor. Drugs that specifically bind to the receptor are then screened using standard methodology in rats, mice or dogs, for the physiological effects. Amino acids deduced from the determination of cDNA can be used to generate either polyclonal or monoclonal antibodies which recognize the D4 receptor sequence but do not recognize D1, D2, D3 or D5 dopamenergic receptors, for use in immunocytochemical studies, and for identification and isolation via flow sorting of D4 expressing cell types.

Abstract: A gene, flanking 5' and 3' sequences and derived cDNA encoding a rat D.sub.4 dopamine receptor that is predominantly located in the cardiovascular and retinal systems is disclosed. The cDNA has been expressed in transfected mammalian cells and demonstrated to preferentially bind dopamine antagonists such as clozapine. The cDNA is useful as a probe for related D.sub.4 dopamine receptors. Expressed in appropriate cell lines, it is useful as an in vitro screen for drugs which specifically bind to the receptor. Drugs that specifically bind to the receptor are then screened using standard methodology in rats, mice or dogs, for the physiological effects. Amino acids deduced from the determination of cDNA can be used to generate either polyclonal or monoclonal antibodies which recognize the D.sub.4 receptor sequence but do not recognize D.sub.1, D.sub.2, D.sub.3 or D.sub.5 dopamenergic receptors, for use in immunocytochemical studies, and for identification and isolation via flow sorting of D4 expressing cell types.