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a nucleoside, guanine riboside, one of the major constituents of RNA.
cyclic guanosine monophosphate a cyclic nucleotide, guanosine 3′,5′-cyclic monophosphate, an intracellular “second messenger” similar in action to cyclic adenosine monophosphate; the two cyclic nucleotides activate different protein kinases and usually produce opposite effects on cell function. Abbreviated 3′,5′-GMP, cGMP, and cyclic GMP.
guanosine monophosphate (GMP) a nucleotide important in metabolism and RNA synthesis.
guanosine triphosphate (GTP) a nucleotide required for RNA synthesis and involved in energy metabolism.
guanosine triphosphate (GTP)
a high-energy nucleotide, similar to adenosine triphosphate, that functions in various metabolic reactions, such as the activation of fatty acids and the formation of peptide bonds in protein synthesis.
a nucleoside, guanine riboside, one of the major constituents of nucleic acids.
cyclic guanosine monophosphate (cyclic GMP, cGMP)
a cyclic 3′,5′-phosphate that acts as an intercellular second messenger mediating the activity of hormones and other substances; essential in vision where cGMP concentrations increase in the dark.
a nucleotide important in metabolism and nucleic acid synthesis; called also GMP.
involved with guanosinetetraphosphate in the so called stringent response of bacteria in which, because the cell does not have a sufficient pool of amino acids to maintain protein synthesis, tRNA and rRNA synthesis is reduced by about 20-fold, which suspends many of the cells' activities until conditions improve.
see guanosine pentophosphate (above).
an energy-rich compound involved in several metabolic reactions; called also GTP.