Photo catalogue for the classification of foci in the BALB/c 3T3 cell transformation assay

This catalogue is a display of focus photos representative of the BALB/c 3T3 cell transformation assay (CTA). It is intended as a visual aid for the identification and the scoring of foci in the conduct of the assay.A proper training from experienced personnel together with the protocol reported in this issue and the present photo catalogue will support method transfer and consistency in the assay results.

► This photo catalogue describes the different types of foci in the BALB/c 3T3 CTA.
► This visual aid will support method transfer and consistency in focus scoring.
► It should be used with the protocol by laboratories that intend to run the assay.