In this study the amount of the gene product in the different tissue samples for the candidate genes will be analyzed. The study design is to compare the expression of genes in cell lines with different genetic variants for genes hypothesized to influence obesity or body mass index and located on chromosome 7. Genetic variants which distinguish the expression of genes will be investigated in other samples derived from this or similar studies. No drug intervention. No patient contacts for this research. No subject participation for this research, which is carried out on existing cell lines, data and DNA. The study will continue until the gene is found or we fail to obtain funding renewal. The expected duration of this component of our study is approximately 4 years.