Classroom Resources

This animation shows how transcription factors find their binding sites in real time. It is based on data from an imaging method that can track single molecules in a living cell.

This animation shows how a variety of proteins interact to regulate the transcription of eukaryotic DNA into RNA.

This animation explores the LUX operon, a set of five genes that are involved in bacterial bioluminescence.

This animation shows how varying concentrations of a signaling molecule activate different transcription factors to determine cell fate.

This animation shows how changes in the regulatory switch regions of the Pitx1 gene lead to morphological differences in stickleback fish.

This animation shows how changes in the regulatory switch regions of a “paintbrush” gene lead to wing spot differences in Drosophila fruit flies.

This animation shows how the PPAR-gamma receptor can activate fat storage and changes in hormone levels.

This animation shows how mRNA is edited to remove noncoding regions.

This animation shows how the protein MECP2 helps switch off gene expression.

This animation shows how X chromosomes are randomly switched off in most female mammals.

This animation shows how the p53 protein binds to DNA to initiate transcription.

This animation explores the molecular interactions that regulate circadian rhythms in Drosophila fruit flies.