David S. Wishart David Arndt Mark V. Berjanskii Anchi Guo Yi Shi Savita Shrivastava Jianjun Zhou You Zhou Guohui Lin PPT-DB: the protein property prediction and testing database. 222-229 2008 36 Nucleic Acids Research Database-Issue http://dx.doi.org/10.1093/nar/gkm800 db/journals/nar/nar36.html#WishartABGSSZZL08