1. The central guanine residues are indicated by the arrows.

2. Hypoxanthine guanine Phosphoribosyl Transferase(HPRT) is a classical gene locus in the research of single gene mutation.

3. It is a layer of guanine crystals which glow at night.

4. The nucleoside guanosine triphosphate (GTP) is derived from guanine, and supplies energy for certain enzymecatlyzed metabolic reactions.

5. Researchers at Purdue University used synthetic forms of guanine and cytosine.

6. The present invention discloses a novel polypeptide, human guanine interconversion factor 12, polynucleotides encoding this polypeptide and DNA recombination process to produce the polypeptide.

7. There are just four kinds: adenine, thymine, guanine and cytosine.

8. This phenomena is consistent with the formation of intrastrand crosslinks between adjacent guanine residues on the template strand.http:///guanine.html

9. It therefore seems that both DNA structure and hydrogen bonding to guanine contribute towards sequence recognition.

10. He uses zeroes and ones to represent the very first chemical building blocks of life (most likely compounds based on adenine, thymine, guanine, cytosine or uracil).

11. The DNA base composition is 32.6 - 33.1 mol % guanine plus cytosine.

12. The most abundant bases are cytosine, thiamine , and uracil ( pyrimidines ) and adenine and guanine ( purines ) .

13. It stores information as a sequence of chemical building blocks (nucleotides) we call A, C, T, and G (for adenine, cytosine, thymine, and guanine in DNA, and uracil replacing thymine in RNA).

14. The base ratio of 1:1 for the bases adenine and thymine and the bases cytosine and guanine was the first clue to the specificity of BASE PAIRING in the nucleic acids.

15. Resembles thymine, but easily interconverts to tautomeric form that pairs with guanine.