mouse 8: guinea pig ~13.5 Table - link days
||Potten CS, Saffhill R, Maibach HI. Measurement of the transit time for cells through the epidermis and stratum corneum of the mouse and guinea-pig. Cell Tissue Kinet. 1987 Sep20(5):461-72 abstract and p.469 figure 5PubMed ID3450396
||Abstract: "A new approach to determine the transit time through the epidermis is presented, involving a gentle washing of the skin surface to collect the loosely attached surface corneocytes. This, it is believed, will be less likely to stimulate the system than tape-stripping or scraping. Radioactively labelled thymidine and iododeoxyuridine have been used to label cells in the basal layer and various labelled amino acids (glycine, cystine and methionine) have been used to label the metabolically viable cell layers (up to and including the granular layer)."
||Abstract: "The resulting changes in surface radioactivity levels have been interpreted to provide a basal to surface transit time of 8-9.5 days for hairless and haired mouse epidermis and about 13.5 days for guinea-pigs." P.469 figure 5: Range for guinea-pigs is 12-15 days