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RT-PCR of RUNX3 in 17-year-old (Case 7) and 34-year-old (Case 9) human normal testes (Cases 7 and 9 correspond to those in Figure 1c ▶ ). RUNX3 mRNA (152 bp) was detected in both. β-actin (587 bp) served as an internal control. SM, size marker.
