Keil, M., Sanchez-Serrano, J. J., & Willmitzer, L. (1989). Both Wound-Inducible
and Tuber-Specific Expression Are Mediated by the Promoter of a Single Member of the Potato Proteinase Inhibitor-Ii Gene Family. EMBO Journal, 8(5), 1323-1330. Retrieved from <Go to ISI>://A1989U504800005
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC400958/pdf/emboj00129-0039.pdf?tool=pmcentrez.