Mutagenicity of Heterocyclic Amines by Biomimetic Chemical Models for Cytochrome P450 in Ames Assay

Ames II Mutagenicity Assay Technical Documentation

Ames II Mutagenicity Assay Technical Documentation

Statistical features of a base-specific Salmonella mutagenicity assay are considered in detail, following up on a previous Ž . report comparing responses of base-specific Salmonella Ames IIe strains with those of traditional tester strains. In addition to using different Salmonella strains, the new procedure also differs in that it is performed as a microwell fluctuation test, as opposed to the...

The Ames Salmonella/microsome mutagenicity assay.

The Ames Salmonella/microsome mutagenicity assay (Salmonella test; Ames test) is a short-term bacterial reverse mutation assay specifically designed to detect a wide range of chemical substances that can produce genetic damage that leads to gene mutations. The test employs several histidine dependent Salmonella strains each carrying different mutations in various genes in the histidine operon. ...

Metabolism of carcinogenic heterocyclic and aromatic amines by recombinant human cytochrome P450 enzymes.

The N-hydroxylation of carcinogenic arylamines represents an initial step in their metabolic activation. Animal studies have shown that this reaction is catalyzed by the cytochrome P450 (P450) enzymes P450 1A1 and P450 1A2. In this study, utilizing enzymes expressed in Escherichia coli (and purified) or in human B-lymphoblastoid cells, the catalytic activities of recombinant human P450 1A1, P45...

Nonparametric regression analysis of data from the Ames mutagenicity assay.

The Ames assay has received widespread attention from statisticians because of its popularity and importance to risk assessment. However, investigators have yet to routinely apply modern regression methods that have been available for more than a decade. We study yet another approach, the application of nonparametric regression techniques, not as the ultimate solution but rather as a framework ...