Bishop, J. G. Group of Genetics and Evolution, MPI for Chemical Ecology, Max Planck Society;
http://dx.doi.org/10.1093/molbev/msi146 (Verlagsversion)
Bishop, J. G. (2005). Directed mutagenesis confirms the functional importance of positively selected sites in polygalacturonase inhibitor protein. Molecular Biology and Evolution, 22(7), 1531-1534. doi:10.1093/molbev/msi146.