- Structures of the human gene for the protein disulfide isomerase-related polypeptide ERp60 and a processed gene and assignment of these genes to 15q15 and 1q21. Koivunen, P., Horelli-Kuitunen, N., Helaakoski, T., Karvonen, P., Jaakkola, M., Palotie, A., Kivirikko, K.I. Genomics (1997)