title: Cyclic AMP as a first messenger.
mesh_terms: D001681:Biological Assay; D002633:Chemotaxis / Q000187:drug effects*; D000242:Cyclic AMP / Q000032:analysis / Q000378:metabolism / Q000494:pharmacology*; D006152:Cyclic GMP / Q000494:pharmacology; D003498:Cyclic P-Oxides / Q000494:pharmacology; D003597:Cytosine Nucleotides / Q000494:pharmacology; D007292:Inosine Nucleotides / Q000494:pharmacology; D009235:Myxomycetes / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D013045:Species Specificity; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship; D013942:Thymine Nucleotides / Q000494:pharmacology; D014500:Uracil Nucleotides / Q000494:pharmacology
chemical_list: D003498:Cyclic P-Oxides; D003597:Cytosine Nucleotides; D007292:Inosine Nucleotides; D013942:Thymine Nucleotides; D014500:Uracil Nucleotides; D000242:Cyclic AMP; D006152:Cyclic GMP