1. Predicted site-specific kinase-substrate relationships in livers and other related materials.
2. Two organisms including Homo sapiens and Mus musculus were considered. 
3. Files:
(1) Human_liver_phosphoproteome.xls: with high-throughput mass spectrometry, we experimentally identified liver phosphoproteome in human liver.
(2) HS.liver.elm: we mapped the human liver phosphoproteome to the UniProt database and made it into Phospho.ELM format.
(3) MM.liver.elm: the data set was taken from: Villen, et al., Proc Natl Acad Sci U S A 104 (2007) 1488-1493. All stated corrected phosphorylation sites were adopted for comparative analysis, while only highly confident sites were taken in the Additional File 3. 
(4) HS.liver.pnc: predicted site-specific kinase-substrate relationships in human liver.
(5) MM.liver.pnc: predicted site-specific kinase-substrate relationships in mouse liver.
(6) HS.liver.conserved.pnc: the conserved site-specific kinase-substrate relationships in human liver. 
(7) MM.liver.conserved.pnc: the conserved site-specific kinase-substrate relationships in mouse liver. 
4. The low threshold was used (refer to our GPS 2.0 article). Both of experimental and predicted PPI information was used. 
5. Last updated, Jun. 30, 2010.
