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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.
Abbreviation for cyclic guanosine 3',5'-monophosphate.
abbreviation for cyclic guanosine monophosphate.
3′5′ cyclic guanosine monophosphate; essential in regulation of sodium channels of the retina. Decrease in cGMP concentration leads to hyperpolarization of the retinal membrane.