Does anybody know where I can buy human laminin-5 ?
I am not sure where you can buy but you might be able to borrow some from the following lab or ask them if they sell:
Institute of physiological Chemistry, Muenster University Hospital, Munster 48149/Germany.
Talk to Dr.K.Kunneken or Dr. G. Pohlentz. They recently developed recombinant human Laminin-5 domains.
I don't think you can buy LN-5 anymore (there used to be a commercial source but they discontinued production). You'll have to purify yourself or find a collaborator.