title: Measurement of adenosine 3',5'-cyclic monophosphate and guanosine 3', 5'-cyclic monophosphate in mussel (Mytilus galloprovincialis lmk.) by high-performance liquid chromatography with diode array detection.
abstract: Two fast and sensitive methods for the determination of cAMP and cGMP levels in mantle tissue of the sea mussel Mytilus galloprovincialis Lmk. are described. Both methods use ion-pair high-performance liquid chromatography with diode array detection. The use of the diode array detector permitted the simultaneous detection of the absorbance at two different wavelengths and the obtaining of the UV absorption spectrum for each detected peak, confirming peak purity and identity. Method precision was good. The detection limit for both nucleotides was 2.5 pmol (signal-to-noise ratio = 4 at 254 nm). Previous to the injection onto the chromatograph, both nucleotides were purified by precipitation of the adenine and guanine 5'-ribonucleotides with ZnSO(4)-Na(2)CO(3). The supernatant obtained was subsequently passed over an anion-exchange column (AG l-X8 formate form resin). Early results seem to indicate that there is a seasonal variation in the contents of both cyclic nucleotides in mantle tissue. Such variation is probably related to the annual gametogenic cycle.
authors.affiliation: Departamento de Bioquímica y Biología Molecular, Universidad de Santiago de Compostela, Lugo, 27002-, Spain.
authors.forename: M J
authors.initials: MJ
authors.lastname: Díaz Enrich
authors.forename: J A
authors.initials: JA
authors.lastname: Villamarín
authors.forename: J I
authors.initials: JI
authors.lastname: Ramos Martínez
authors.forename: I
authors.initials: I
authors.lastname: Ibarguren
mesh_terms: D000818:Animals; D049872:Bivalvia; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D000242:Cyclic AMP / Q000032:analysis* / Q000302:isolation & purification; D006152:Cyclic GMP / Q000032:analysis* / Q000302:isolation & purification; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000242:Cyclic AMP; D006152:Cyclic GMP