Likewise, regardless of UA levels, we found elevated levels of ALT and AST in Tibetans relative to Hans, in contrast with lower levels of albumin (Figures 3IB, 3IIB) and urea (Figure 4I) in Groups A and B, instead of in Group C. The discrepancy between Groups A, B and C might have contributed to the higher BMI in Tibetans than in Hans in the former two groups and similar BMI between Tibetans and Hans in Group C. These findings indicate that enhanced amino acid utilization and transamination may underlie hyperuricemia in Tibetans. This evidence concerns the gene GPT and hyperuricemia.