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Are free-floating amino acids found in the nucleus of a cell?

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Bruce Patterson's answer is excellent — molecules where go where they are sent or where they can't be excluded — but there is also an amino acid which is critical to a reaction which takes place in the nucleus. read more

S-adenosylmethionine is the donor of methyl groups for methylases, including DNA methylases and histone methylases found in the nucleus. Of course it’s not exactly one of the 21 amino acids used in translation of human proteins, but it is a derivative of one and chemically is still an amino acid — as is the S-adenosylhomocysteine which results from it donating a methyl group. read more

C. The synthesis of a specific sequence of amino acids on a ribosome. D. A molecule found in the nucleus of cell that contains the cell's genome. E. A molecule made of amino acids that correspond to the genetic information in a structural gene. read more

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