The History of TerrorismPreview

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Physical sciences
Chemistry
Organic chemistry
Substituents
Alkyl groups
Methyl group
1944?-1958 Methylated bases were discovered in DNA about 20 years ago and in RNA. in 1958. Until recently, however, no one had any idea how methyl groups got to be stuck onto the normally unmethylated bases in nucleic acids or what they were doing there.
1962 The first important break in this problem was reported by Dr. Fleissner and Dr. Borek in 1962 when they showed that the methyl groups became attached to...

...nucleic acids 'after-rather than before-the primary structures of these complicated molecules had been completed.

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1962 The first important break in this problem was reported by Dr. Fleissner and Dr. Borek in 1962 when they showed that the methyl groups became attached to...

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They also found that methyl groups are attached to nucleic acids by the action of special protein molecules, called enzymes.

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