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Answer for the clue "A purine base found in DNA and RNA ", 7 letters:
guanine

Alternative clues for the word guanine

Word definitions for guanine in dictionaries

Wikipedia Word definitions in Wikipedia
Guanine ( G, Gua ) is one of the four main nucleobases found in the nucleic acids DNA and RNA , the others being adenine , cytosine , and thymine ( uracil in RNA). In DNA , guanine is paired with cytosine. The guanine nucleoside is called guanosine . With ...

Wiktionary Word definitions in Wiktionary
n. (context chemistry English) A substance first obtained from guano; it is a nucleic base and pairs with cytosine in DNA and RNA.

WordNet Word definitions in WordNet
n. a purine base found in DNA and RNA; pairs with cytosine [syn: G ]

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1850, from guano , from which the chemical first was isolated, + chemical suffix -ine (2).

Usage examples of guanine.

Spiraling pairs of cytosine, guanine, adenine, and thymine: we know these are instructions for growth, for the development of life, all coded in sequences of paired elements.

The limited informational content of DNAthe four bases adenine, guanine, cytosine, and thyminedid not seem adequate to build the fantastically varied amino acid necklaces.

They represented the nucleotides adenine, thymine, guanine, and cytosine.

The toggle must have been set for DNA mode, since the buttons were displaying the Neanderthal glyphs for adenine, guanine, thymine, and cytosine.

Or, in other words, a 1 in 4 chance, since there is adenine, guanine, cytocine and uracil in which to fill the proper spot.

Glutamic acid, without which ammonia accumulates in the brain and kills, dribbled along the floor while they glared, and D-ribose, and D-2-deoxyribose, adenine, guanine, uracil, cytosine, thymine and 5-methyl cytosine without which no thing higher than a trilobite can pass on its shape and meaning to its next generation.

She had used the base pairs of the DNA---combinations of pairs of four nucleotides called adenine, guanine, cytosine, and thy mine--to encode her message.

The eye itself is made of millions of tiny facets built up of alternating layers of cytoplasm and guanine crystalson the same principle as the mirror optics of the Nar eye and the eyes of the other advanced life forms on this planet.

She had used the base pairs of the DNA---combinations of pairs of four nucleotides called adenine, guanine, cytosine, and thy mine--to encode her message.

The toggle must have been set for DNA mode, since the buttons were displaying the Neanderthal glyphs for adenine, guanine, thymine, and cytosine.

Each side of these base pairs can either be an adenine -thymine or a guanine -cytosine bond, and they can be aligned either direction, so there are four choices.

In fact, adenine, guanine, thymine, and cytosine molecules have quite different structures, and their electron density distributions as seen by a scanning probe microscope are readily distinguished by an experienced eye.