Links

Scansite - Scans for protein sequence motifs and phosphorylation sites
http://scansite.mit.edu/

Molecular and cellular information about protein kinases
http://pkr.sdsc.edu/html/index.shtml

Prediction of potential phosphorylation sites.
http://www.cbs.dtu.dk/services/NetPhos/

GenBank, BLAST search
http://www.ncbi.nlm.nih.gov/BLAST/

A database of protein families and domains
http://www.expasy.org/prosite/