MIR135A2: MIR135A2 is a microRNA that has been investigated for its role in modulating midbrain development [PMC3861205]. In a study, the researchers aimed to determine if MIR135A2 is capable of repressing Lmx1b, a gene involved in midbrain development [PMC3861205]. To test this hypothesis, they conducted a luciferase assay in HEK293 cells [PMC3861205]. The results showed that MIR135A2 was able to repress a construct containing a fragment of the Lmx1b 3′UTR [PMC3861205]. However, when constructs with mutations within the evolutionarily conserved MIR135A2 binding site of the Lmx1b 3′UTR were used, repression was not observed [PMC3861205]. These findings suggest that MIR135A2 specifically targets and represses Lmx1b through its binding site within the 3′UTR of the gene [PMC3861205]. This study provides evidence for the role of MIR135A2 in modulating midbrain development by regulating Lmx1b expression [PMC3861205]. Further research is needed to fully understand the mechanisms and implications of this regulatory interaction [PMC3861205].