Calfon, Zeng, Urano et al.: "IRE1 couples endoplasmic reticulum load to secretory capacity by processing the XBP-1 mRNA." in: Nature, Vol. 415, Issue 6867, pp. 92-6, 2002 (PubMed).
Yoshida, Matsui, Yamamoto et al.: "XBP1 mRNA is induced by ATF6 and spliced by IRE1 in response to ER stress to produce a highly active transcription factor." in: Cell, Vol. 107, Issue 7, pp. 881-91, 2002 (PubMed).
Haze, Yoshida, Yanagi et al.: "Mammalian transcription factor ATF6 is synthesized as a transmembrane protein and activated by proteolysis in response to endoplasmic reticulum stress." in: Molecular biology of the cell, Vol. 10, Issue 11, pp. 3787-99, 1999 (PubMed).
Little, Ramakrishnan, Roy et al.: "The glucose-regulated proteins (GRP78 and GRP94): functions, gene regulation, and applications." in: Critical reviews in eukaryotic gene expression, Vol. 4, Issue 1, pp. 1-18, 1995 (PubMed).