20年后，研究者通过提取肥胖老鼠的突变基因鉴定出这一激素。
Researchers identified this hormone 20 years later by isolating the gene that was mutated in the obese mice.
然而，从1980年到2000年，美国肥胖症患者数增加了一倍——基因影响无法导致如此快的增长速度。
Yet, between 1980 and 2000, the number of Americans who are obese has doubled — too quickly for genetic factors to be responsible.
病人检测基因组（染色体组）的成本戏剧性地急剧下降。到2007 年，科学家们已能识别出糖尿 病，关节炎，双向性精神障碍，高血压和肥胖症的各自特有基因。
The cost of reading a patient's genome fell dramatically, and by 2007 scientists were able to link specific genes to diabetes, arthritis, bipolar disorder, high blood pressure and obesity.
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