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Search Results for “Pyrimidines”
 
 
1) pyrimidine. The Columbia Encyclopedia, Sixth Edition. 2001
...pyrimidine, (pirim´iden´) (KEY) , type of organic base found in certain coenzymes and in the nucleic acids of plant and animal tissue. The three major pyrimidines...

2) serine. The Columbia Encyclopedia, Sixth Edition. 2001
...Only the l-stereoisomer appears in mammalian protein. It is not essential to the human diet, since it can be synthesized in the body from other metabolites, including...

3) uracil. The Columbia Encyclopedia, Sixth Edition. 2001
...When combined with the sugar ribose in a glycosidic linkage, uracil forms a derivative called uridine (a nucleoside), which in turn can be phosphorylated with from...

4) thymine. The Columbia Encyclopedia, Sixth Edition. 2001
...Thymine was the first pyrimidine to be purified from a natural source, having been isolated from calf thymus and beef spleen in 1893-4. The accepted structure of...

5) immunosuppressive drug. The Columbia Encyclopedia, Sixth Edition. 2001
...They are commonly used to prevent rejection by a recipient's body of an organ transplanted from a donor. A transplant is rejected when the recipient's immune system...

6) metabolite. The Columbia Encyclopedia, Sixth Edition. 2001
...Starting materials are substances, usually small and of simple structure, absorbed by the organism as food. These include the vitamins and essential amino acids....

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