serrate-1 decreases the accumulation of microRNA cleavage products. (A) Agarose gels showing the nested PCR products of PHB, NAC1 and ARF8 microRNA (miRNA) cleavage products. (B) Southern blot analysis of the PHB, NAC1 and ARF8 miRNA cleavage products hybridized with a probe corresponding to the 5′ rapid amplification of cloned ends nested PCR products. The UBIQUITIN (UBQ) loading control is shown below. ARF, AUXIN RESPONSE FACTOR; NAC, for NAM, ATAF1-2, CUC2; PHB, PHABULOSA; se-1, serrate-1; WT, wild type.