- Application of 5-azido-UDP-glucose and 5-azido-UDP-glucuronic acid photoaffinity probes for the determination of the active site orientation of microsomal UDP-glucosyltransferases and UDP-glucuronosyltransferases. Drake, R.R., Igari, Y., Lester, R., Elbein, A.D., Radominska, A. J. Biol. Chem. (1992)