A, B, Oxidative damage to RNA nucleosides (8-oxoGuo, A) and DNA nucleosides (8-oxodGuo, B) in coelomocytes from Glycera dibranchiata exposed to sulfide in vivo. Concentrations of oxidized nucleosides are presented per 106 undamaged nucleosides, with circles representing individual data and horizontal lines representing the means for each treatment (two or three worms per treatment for DNA, three worms per treatment for RNA). C, Ratio of oxidatively damaged nucleosides from RNA and DNA. Note that although the data in A and B were analyzed by linear regression, the abscissas in the plots are log scaled. 8-oxoGuo = 8-oxo-7,8-dihydroguanosine; 8-oxodGuo = 8-oxo-7,8-dihydro-2′-deoxyguanosine; Guo = guanosine; dGuo = deoxyguanosine.