- Comparative structural and functional analysis of the olfactory receptor genes flanking the human and mouse beta-globin gene clusters. Bulger, M., Bender, M.A., van Doorninck, J.H., Wertman, B., Farrell, C.M., Felsenfeld, G., Groudine, M., Hardison, R. Proc. Natl. Acad. Sci. U.S.A. (2000)