Medical Definition of Guanosine pentaphosphate
1.
Guanosine 5'-triphosphate 2'(3')-diphosphate. A guanine nucleotide containing five phosphate groups. Three phosphate groups are esterified to the sugar moiety in the 5' position and the other two in the 2' or 3' position. This nucleotide serves as a messenger to turn off the synthesis of ribosomal RNA when amino acids are not available for protein synthesis. Synonym: magic spot II.
Chemical name: Guanosine 5'-(tetrahydrogen triphosphate), 3'-(trihydrogen diphosphate)
(12 Dec 1998)
Lexicographical Neighbors of Guanosine Pentaphosphate
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