Dr. David Bartel and colleagues have identified 16 novel miRNAs in Arabidopsis that regulate gene expression during development. The researchers demonstrate a plant homologue of the Dicer enzyme, CARPEL FACTORY (CAF), which processes plant miRNAs with sequence and structural similarities to animal miRNAs.
Researchers found that repeated exposure to online banner ads can lead to future sales, even if no clicks occur immediately. The study suggests that advertisers use banner ads strategically to smooth out sales and increase basket expenditures.
Researchers at Cold Spring Harbor Laboratory have discovered that Spot 42, a small RNA, differentially regulates gene expression in the E. coli galactose operon through an antisense mechanism. The study provides mechanistic insight into the process and answers long-standing biological questions.