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Cell memory mechanism discovered

DNA binding proteins called transcription factors are required for maintaining cell identity. They ensure that daughter cells have the same function as their mother cell. However, each time a cell divides the specific binding pattern of the transcription factors is erased and has to be restored in both mother and daughter cells. Previously it was unknown how this process works, but now scientists have discovered the importance of particular protein rings encircling the DNA and how these function as the cell's memory.
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