Kumar, A., Tyagi, N. K., & Kinne, R. K. H. (2007). Ligand-mediated conformational changes and positioning of tryptophans in reconstituted human sodium/D-glucose cotransporter 1 (hSGLT1) probed by tryptophan fluorescence. Biophysical Chemistry, 127(1-2): 1, pp. 69-77. Retrieved from http://dx.doi.org/10.1016/j.bpc.2006.12.006.