The SJL inbred model was developed by Lambert et al of the Jackson Laboratory in 1955 from Swiss Webster outbred mice of three origins. The Cancer Research Center received stock from the Jackson Laboratory. The NIH Genetic Resource received stock from the Cancer Research Center. Taconic received stock at F9+ from the NIH Genetic Resource in 1999. The mice were derived by embryo transfer in 2000. The Taconic foundation colony was at F29 in 2005.