Xenometrix is a company specialized in the production, distribution and service of bioassays, such as mutagenicity test systems, e.g. Ames II, Ames MPF PENTA I, Ames MPF 1535, etc. The tests come as a complete kit, are standardized and quality controlled. They are run in a liquid format on 384 well plates. The assay system is a microsystems listed in the ICH M7 guideline and it is a version of the Ames fluctuation test cited in the OECD / FDA guidelines. Several publications showing a high concordance with the agar plate method are available. Xenometrix also offers all accessories to perform the Ames assay, such as S9, positive controls, S9 Cofactor solution, etc.