Add time:09/24/2019         Source:sciencedirect.com

Aceanthrylene, a non-alternant cyclopenta-fused hydrocarbon, was shown to be weakly mutagenic without S9 and strongly mutagenic with S9 in the Ames Salmonella plate incorporation assay. The compound was most active in strain TA100 (35 revertants/nmole in the presence of 0.3 mg of S9 protein), and less active in strains TA98, TA1537 and TA1538 (20, 10 and 3.1 rev/nmole respectively, +S9). Strain TA1535 was unresponsive, suggesting that this compound induces frameshift mutations rather than base-pair substitutions. The mutagenic potency of aceanthrylene is consistent with predictions of its activity based on the relatively large delocalization energy (Δdelocβ = 0.931) of the carbonium ion which would result from oxirane ring opening of the 1,2-epoxide, a potential active metabolite.

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