- Heat shock transcription factor 2 is not essential for embryonic development, fertility, or adult cognitive and psychomotor function in mice. McMillan, D.R., Christians, E., Forster, M., Xiao, X., Connell, P., Plumier, J.C., Zuo, X., Richardson, J., Morgan, S., Benjamin, I.J. Mol. Cell. Biol. (2002)