- A cellular UDP-glucose deficiency causes overexpression of glucose/oxygen-regulated proteins independent of the endoplasmic reticulum stress elements. Flores-Diaz, M., Higuita, J.C., Florin, I., Okada, T., Pollesello, P., Bergman, T., Thelestam, M., Mori, K., Alape-Giron, A. J. Biol. Chem. (2004)