@article{article, title  = {{PPD v1.0--an integrated, web-accessible database of experimentally determined protein pKa values}},

 publisher = {{Oxford University Press (OUP)}},

 url = {{https://doi.org/10.1093/nar/gkj035 }},

 year = {{2006}},

 month = {{1}},

 author = {{Toseland CP}},

 doi = {{10.1093/nar/gkj035}},

 volume = {{34}},

 journal = {{Nucleic Acids Research}},

 issue = {{90001}},

 pages = {{D199-D203}},

 note = {{Accessed on 2025/12/04}}}