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wood prints biochemical wood prints biological wood prints coiling wood prints compacted wood prints compaction wood prints epigenetics wood prints gene expression wood prints genetic wood prints histone tails wood prints molecule wood prints no-one wood prints nobody wood prints p53 wood prints proteins wood prints ribonucleic acid wood prints

photographs biochemical photos biological photos coiling photos compacted photos compaction photos epigenetics photos gene expression photos genetic photos histone tails photos molecule photos no-one photos nobody photos p53 photos proteins photos ribonucleic acid photos

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DNA histones and gene transcription. Illustration of a stage in the transcription of DNA (deoxyribonucleic acid), with RNA (ribonucleic acid) at upper centre and upper left, and a transcription enzyme at centre right, acting on the P53 gene (a tumour suppression gene). The DNA strands coil around proteins called histones (blue). This forms circular structures called nucleosomes (several shown here). These histones have 'tails' sticking out for modification by attracting other proteins to attach to them. This process (involving histone factors such as histone methylation) affects the expression of the genes and is an example of epigenetics.

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