Edbauer, Winkler, Regula et al.: "Reconstitution of gamma-secretase activity." in: Nature cell biology, Vol. 5, Issue 5, pp. 486-8, 2003 (PubMed).
Kimberly, LaVoie, Ostaszewski et al.: "Gamma-secretase is a membrane protein complex comprised of presenilin, nicastrin, Aph-1, and Pen-2." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 100, Issue 11, pp. 6382-7, 2003 (PubMed).
Marlow, Canet, Haugabook et al.: "APH1, PEN2, and Nicastrin increase Abeta levels and gamma-secretase activity." in: Biochemical and biophysical research communications, Vol. 305, Issue 3, pp. 502-9, 2003 (PubMed).
Clark, Gurney, Abaya et al.: "The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment." in: Genome research, Vol. 13, Issue 10, pp. 2265-70, 2003 (PubMed).
Ota, Suzuki, Nishikawa et al.: "Complete sequencing and characterization of 21,243 full-length human cDNAs." in: Nature genetics, Vol. 36, Issue 1, pp. 40-5, 2003 (PubMed).