Patent ID: 8039259

Claim:
A buffer solution for suspending animal or human cells and for dissolving biologically active molecules in order to introduce said biologically active molecules into the cells using electric current, the buffer solution consisting essentially of: 4-6 mM KCl, 10-20 mM MgCl 2 , 5-25 mM HEPES, 50-160 mM Na 2 HPO 4 /NaH 2 PO 4 (at a pH of about 7.2), and 5-100 mM sodium lactobionate, and wherein the buffer solution has a buffer capacity of at least 20 mmol * 1 −1 * pH −1 at a change in the pH from pH 7 to pH 8 and at a temperature of 25° C., and an ionic strength of at least 200 mmol * 1 −1 .