Embryonic stem (ES) cells have a globally 'open' and dynamic chromatin state. Histone H3 lysine 4 trimethylation (H3K4me3) and H3K27me3 'bivalency' is observed in ES cells that are cultured in the ...

In the Introduction to the Derivative video we introduce the notion of the derivative of a function and explain how the derivative captures the instantaneous rate of change of a function. In the ...