Insulin resistance and hyperinsulinemia are major predictors of NIDDM. Since several studies have demonstrated that heredity plays a significant role in the development of insulin resistance (1), defects in genes that regulate insulin action could potentially contribute to the risk of NIDDM. A locus on chromosome 4q has been shown to be linked with fasting insulin levels (2), 2-h insulin levels (3,4), and insulin action (2) in Pima Indians and Mexican-Americans, suggesting that the fatty acid binding protein 2 (FABP2) gene is a promising candidate gene for insulin resistance and NIDDM.

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