Do you have a protocol for purification of genomic DNA from cultured cells using the QIAamp DNA Micro Kit?
FAQ ID -1547

Yes, please follow the User-Developed Protocol 'Purification of genomic DNA from cultured cells using the QIAamp DNA Micro Kit' (QA43).

Note:  The maximum amount of cells that can be used with this protocol has not been thoroughly tested.  However, we would suggest using no more than 1 x 106 cells.