Enzyme kinetics database

[Jurgen Pleiss]

Dear colleagues:

I am searching for a database (access via WWW,e-mail,...) with data on enzyme
kinetics, e.g. for a given enzyme:tell me the KM and kcat 
of different substrates, the KI's of inhibitors, the pH range,...
Does such a database exist for receptor proteins, too?

Thank you for your support!

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Dr.Juergen Pleiss                 Email:jpleiss at orgch01.chemie.uni-stuttgart.de
Institute for Organic Chemistry   Phone:(49)-711-6854260
University of Stuttgart           Fax:  (49)-711-6854269
D-70569 Stuttgart
Germany